Mr_Tilt Posted April 9, 2021 Share Posted April 9, 2021 2 hours ago, pwr said: also available in white? And black too apparently. 1 Link to post Share on other sites More sharing options...
apt-e Posted April 9, 2021 Share Posted April 9, 2021 (edited) Hi , The primer I have seen was code AK758 in grey. Hope this helps people. Regards Paul. This is a test part with primer and one coat of brushed on paint. I actually forgot to sand this also, Edited April 9, 2021 by apt-e Link to post Share on other sites More sharing options...
RMweb Premium ColinK Posted April 9, 2021 RMweb Premium Share Posted April 9, 2021 Rather than sand, try scraping a blade along the material with the blade at 90 degrees to the print marks. Then apply the microfiller primer. 1 Link to post Share on other sites More sharing options...
apt-e Posted April 9, 2021 Share Posted April 9, 2021 (edited) 2 hours ago, ColinK said: Rather than sand, try scraping a blade along the material with the blade at 90 degrees to the print marks. Then apply the microfiller primer. Thanks Colin, will give that a try also. Edited April 9, 2021 by apt-e Link to post Share on other sites More sharing options...
apt-e Posted April 12, 2021 Share Posted April 12, 2021 A bit more me trying to test paint. Think it looks OK to say it's brushed. Stay safe. Regards Paul. 4 Link to post Share on other sites More sharing options...
apt-e Posted April 13, 2021 Share Posted April 13, 2021 Started a full side test paint. Small test part was done red first then blue and looked OK. I am no painter but I am happy with it. You have to look stupidly hard to see any print pattern. I like to think that my kits give you a full model for novice and medium level builders, and something to build and then super fine detail for the experts. I hope that is the case. I thank everyone who has support me over the past years and enjoy what I do. More to come........... Stay safe everyone. Regards Paul. 8 Link to post Share on other sites More sharing options...
apt-e Posted April 14, 2021 Share Posted April 14, 2021 Four tests for painting. All have had 2 coats of paint. Bottom two are best..... going to go with one of those on my main model. 2 Link to post Share on other sites More sharing options...
apt-e Posted April 14, 2021 Share Posted April 14, 2021 Just to get an idea of how it will look. Window frames added for effect. 3 Link to post Share on other sites More sharing options...
Michael Hodgson Posted April 14, 2021 Share Posted April 14, 2021 1 hour ago, apt-e said: Just to get an idea of how it will look. Window frames added for effect. You seem to have cut bits off the ends of that coach side - are you building a cut & shut of something else? Link to post Share on other sites More sharing options...
apt-e Posted April 14, 2021 Share Posted April 14, 2021 (edited) 17 minutes ago, Michael Hodgson said: You seem to have cut bits off the ends of that coach side - are you building a cut & shut of something else? Lol Mike, APT 4........... super loop train. Edited April 14, 2021 by apt-e 1 Link to post Share on other sites More sharing options...
apt-e Posted April 15, 2021 Share Posted April 15, 2021 Sides painted... 3 Link to post Share on other sites More sharing options...
apt-e Posted April 17, 2021 Share Posted April 17, 2021 (edited) A bit if progress today...... End of each roof section should be grey, will sort that, and side pattern should go to the very end, but I like the yellow ends. Not finished the end paint detail but happy with it so far. Edited April 17, 2021 by apt-e 3 1 Link to post Share on other sites More sharing options...
RMweb Gold Darius43 Posted April 18, 2021 RMweb Gold Share Posted April 18, 2021 Just spotted something awry with the Lab 4 roof... It’s been in the sun and the roof clearly didn’t take kindly to it. Going to try the hot water straightening treatment... Darius 1 Link to post Share on other sites More sharing options...
apt-e Posted April 18, 2021 Share Posted April 18, 2021 (edited) 29 minutes ago, Darius43 said: Just spotted something awry with the Lab 4 roof... It’s been in the sun and the roof clearly didn’t take kindly to it. Going to try the hot water straightening treatment... Darius Hi Darius, Pla+ does not like direct sunlight. Not seen it do that though. Once painted its fine, I've not seen or heard of any problems, and I haven't had any issues myself. All very odd. I have some spares so will send you a couple. No problem, will get it posted tomorrow for you. Regards Paul. Edited April 18, 2021 by apt-e Link to post Share on other sites More sharing options...
RMweb Gold Darius43 Posted April 18, 2021 RMweb Gold Share Posted April 18, 2021 Hi Paul, Many thanks for this. The hot water treatment seems to have worked and the roof is now pressed down flat with weights atop. I will let it cool down slowly to see if it stays flat and let you know. The rest of the coach is fine and is now located safely away from direct sunlight. Cheers Darius 2 Link to post Share on other sites More sharing options...
RMweb Premium ColinK Posted April 18, 2021 RMweb Premium Share Posted April 18, 2021 My first train set was from Triang and all the coaches developed roofs like that over time! 1 Link to post Share on other sites More sharing options...
RMweb Gold Darius43 Posted April 18, 2021 RMweb Gold Share Posted April 18, 2021 The hot water treatment has worked but in the process the roof has appeared to shrink lengthwise. I can add and blend in plasticard spacers to the ends, which will be preferable to sanding and smoothing a new roof. Cheers Darius 1 Link to post Share on other sites More sharing options...
Michael Hodgson Posted April 18, 2021 Share Posted April 18, 2021 2 hours ago, ColinK said: My first train set was from Triang and all the coaches developed roofs like that over time! I doubt if the hot water treatment will work with those though. 1 Link to post Share on other sites More sharing options...
apt-e Posted April 18, 2021 Share Posted April 18, 2021 32 minutes ago, Darius43 said: The hot water treatment has worked but in the process the roof has appeared to shrink lengthwise. I can add and blend in plasticard spacers to the ends, which will be preferable to sanding and smoothing a new roof. Cheers Darius The offer of some spare roofs is still open Darius, if you need them. 1 Link to post Share on other sites More sharing options...
Michael Hodgson Posted April 18, 2021 Share Posted April 18, 2021 27 minutes ago, Darius43 said: The hot water treatment has worked but in the process the roof has appeared to shrink lengthwise. So does that mean the material has bulged out in other directions ? It doesn't appear from the photos to have done so, and I'm assuming none of it has left in the form of vapour. so what has happened - some form of chemical reaction with the atmosphere or has there been a molecular rearrangement into a more compact form? I am also wondering what the effect would be if the roof had been securely glued on along its whole length - would the whole body have warped? Paul believes that it doesn't happen when painted, but if sounds to me like the problem is temperature related - so I would expect a painted roof to do much the same. From what I have read, my understanding is that PLA is a thermoplastic, and that it would go through a glass transition at around 60 Celsius and melt at c. 150 Celsius. If it were reacting with the atmosphere, paint might act as a barrier preventing it, and I suppose a layer of paint might merely slow down the rate at which solar energy get through to the component otherwise I am at a loss to see why paint would offer any protection. Perhaps it is important to keep this rolling stock out of strong sunlight? Link to post Share on other sites More sharing options...
RMweb Gold Darius43 Posted April 18, 2021 RMweb Gold Share Posted April 18, 2021 11 minutes ago, Michael Hodgson said: Paul believes that it doesn't happen when painted, but if sounds to me like the problem is temperature related - so I would expect a painted roof to do much the same. From what I have read, my understanding is that PLA is a thermoplastic, and that it would go through a glass transition at around 60 Celsius and melt at c. 150 Celsius. If it were reacting with the atmosphere, paint might act as a barrier preventing it, and I suppose a layer of paint might merely slow down the rate at which solar energy get through to the component otherwise I am at a loss to see why paint would offer any protection. Perhaps it is important to keep this rolling stock out of strong sunlight? The roof had several coats of primer on it before it curled. Definitely no direct sunlight for rolling stock built from this material. Darius 1 Link to post Share on other sites More sharing options...
apt-e Posted April 18, 2021 Share Posted April 18, 2021 (edited) Hi all, What I meant is that pla and pla+ do not like being warmed up . When I tested this some years ago direct sunlight, in a window warped the shape. 30+ degrees and things can go wrong. The same happens to airfix kits if left on a window, I learnt that the hard way with a very expensive harrier jump jet. I also had a Hornby apt-p driving coach go the same way. Won't do that again. Basically don't leave your models in direct sunlight, EVER... Hope this clears up a few things people. Stay safe. Regards Paul. Edited April 18, 2021 by apt-e 1 Link to post Share on other sites More sharing options...
apt-e Posted April 18, 2021 Share Posted April 18, 2021 On a better note.... Glass fitted and the painted internals going in...... 2 1 1 Link to post Share on other sites More sharing options...
Mr_Tilt Posted April 18, 2021 Share Posted April 18, 2021 Looking pretty good Paul. Are you going to have the true scale oil leaks included as well? 1 Link to post Share on other sites More sharing options...
apt-e Posted April 19, 2021 Share Posted April 19, 2021 (edited) 18 hours ago, Michael Hodgson said: So does that mean the material has bulged out in other directions ? It doesn't appear from the photos to have done so, and I'm assuming none of it has left in the form of vapour. so what has happened - some form of chemical reaction with the atmosphere or has there been a molecular rearrangement into a more compact form? I am also wondering what the effect would be if the roof had been securely glued on along its whole length - would the whole body have warped? Paul believes that it doesn't happen when painted, but if sounds to me like the problem is temperature related - so I would expect a painted roof to do much the same. From what I have read, my understanding is that PLA is a thermoplastic, and that it would go through a glass transition at around 60 Celsius and melt at c. 150 Celsius. If it were reacting with the atmosphere, paint might act as a barrier preventing it, and I suppose a layer of paint might merely slow down the rate at which solar energy get through to the component otherwise I am at a loss to see why paint would offer any protection. Perhaps it is important to keep this rolling stock out of strong Uv light through windows is an issue also, the paint helps massively with stopping this and also protects. I always use PLA+ which melts at 175 degrees. It's all an issue with the medium sadly, as long as you follow some simple rules, it will be ok. Hope this helps people. Stay safe Regards Paul. Edited April 19, 2021 by apt-e 2 Link to post Share on other sites More sharing options...
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