Quarryscapes Posted January 24, 2021 Share Posted January 24, 2021 I've just purchased a Cambrian 2 plank from MM1, which is covered in mould release. The instructons such as they are say wash in soapy water. Tried that, at various temperatures, that didn't touch it. Tried airbrush cleaner, that didn't touch it. Tried white spirit, nope. Tried Full on cellulose thinners, and still nope. Tried a different kind of soapy cleaner, still nothing. Even tried painting it just in case I was being dim and it wasn't really a mould release...nope, it is, paint comes right off. I've even tried abrading it off, and nothing! Short of giving up and sending it back, what else might I try? Link to post Share on other sites More sharing options...
RMweb Gold Mick Bonwick Posted January 24, 2021 RMweb Gold Share Posted January 24, 2021 Angle grinder. That might give you other problems, though. Link to post Share on other sites More sharing options...
RMweb Gold Mick Bonwick Posted January 24, 2021 RMweb Gold Share Posted January 24, 2021 Given what you've already tried, there doesn't seem to be much left that's likely to work. I see you haven't tried IPA yet, but if cellulose thinners doesn't move it then that might not make a difference either. Do you have an ultrasonic cleaner? That removes loose paint and caked-on grime, so it might work on whatever your model is afflicted with. Might. Link to post Share on other sites More sharing options...
Quarryscapes Posted January 24, 2021 Author Share Posted January 24, 2021 33 minutes ago, Mick Bonwick said: Given what you've already tried, there doesn't seem to be much left that's likely to work. I see you haven't tried IPA yet, but if cellulose thinners doesn't move it then that might not make a difference either. Do you have an ultrasonic cleaner? That removes loose paint and caked-on grime, so it might work on whatever your model is afflicted with. Might. IPA didn't touch it either, nor did any of the above at 65° in the ultrasonic cleaner help. But I think I have found the solution, though it's going to be messy - Soda blasting. 1 Link to post Share on other sites More sharing options...
Quarryscapes Posted January 25, 2021 Author Share Posted January 25, 2021 On 24/01/2021 at 10:55, Quarryscapes said: IPA didn't touch it either, nor did any of the above at 65° in the ultrasonic cleaner help. But I think I have found the solution, though it's going to be messy - Soda blasting. And that didn't do it either, nor did Windolene nor Hydrochloric/FOrmic acid. The soda blasting did get all the remnants of partially stuck paint off though, which is good! 1 Link to post Share on other sites More sharing options...
brossard Posted January 25, 2021 Share Posted January 25, 2021 I've done several JLTRT kits and the resin castings have been mostly good, certainly no mould release issues. I'm wondering how the moulder gets rid of the release agent given the measures you have taken. Perhaps the stuff cures after a time. Maybe worth a query to MM1? John Link to post Share on other sites More sharing options...
wirey33 Posted January 25, 2021 Share Posted January 25, 2021 If someone has a product that is resistant to all that abuse, you might want to find out what it is, bottle it, make a good marketing plan and start planning your retirement :-) Link to post Share on other sites More sharing options...
Quarryscapes Posted January 25, 2021 Author Share Posted January 25, 2021 11 minutes ago, wirey33 said: If someone has a product that is resistant to all that abuse, you might want to find out what it is, bottle it, make a good marketing plan and start planning your retirement :-) It's already out there, and I'm not sure it's that useful! 1 hour ago, brossard said: I've done several JLTRT kits and the resin castings have been mostly good, certainly no mould release issues. I'm wondering how the moulder gets rid of the release agent given the measures you have taken. Perhaps the stuff cures after a time. Maybe worth a query to MM1? John The casting is beautiful....just useless if it can't be painted! I've e-mailed MM1 asking to swap the casting, this was supposed to have be my weekend de stress project, not a science experiment! 1 Link to post Share on other sites More sharing options...
RMweb Gold phil_sutters Posted January 25, 2021 RMweb Gold Share Posted January 25, 2021 I have just had a similar problem with Crossley Staff Car resin kit. The last thing I used was meths, scrubbed on with cotton buds. That seems to have worked ok. Link to post Share on other sites More sharing options...
Phil Traxson Posted January 26, 2021 Share Posted January 26, 2021 (edited) I always recommend using "CIF" and a tooth brush for cleaning in my resin kit instructions, but then again I don't use any extra mould release agent above that contained in the silicone rubber I use for the moulds. Some use washing up liquid, but a lot of those contain lanolin (to keep hands soft), unfortunately this replaces one unpaintable chemical with another of the same. Phil Traxson Port Wynnstay Models Edited January 26, 2021 by Phil Traxson Link to post Share on other sites More sharing options...
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