57xx

It shows some proper thought and knowledge of the subject rather than the oft repeated parroting of some incorrect information that we often get. I was also curious as to the other by-products of the reaction.

What's the formula for that reaction?

And ale....

Hence why I said "if you can find it second hand or NOS".

True, along with most being converted to fruit or ale vans due to the lack of cattle traffic way before that time, but irrelevant anyhow as I missed the OP already mentioned it. The only "problem" with the kit I'm aware of is the roof profile being slightly wrong.

One more kit, if you can find it second hand or NOS, is the Coopercraft GWR W1/W5.

Presuming you meant hydrogen sulphide there.

You also got the Bachmann "GWR" cattle wagon to add to the RTR offerings: https://www.Bachmann.co.uk/product/8t-cattle-wagon-gwr-grey/37-711d I believe it is more BR than GWR and possibily that it has got wonky dimensions too. Others who have look at it in more detail can confirm/deny. Also, I reluctantly mention the Oxford Rail offering of the LNER cattle wagon: https://www.oxforddiecast.co.uk/products/cattle-wagon-lner-196488-or76cat003 See the thread in the OR section on RMWeb for all it's failings. I'd ignore the vast majority of online reviews as they all appear to be fawning over the price and OR rather than accuracy, with the reviewers having no prototype knowledge at all.

That has definitely become one of the modelling memes floating about.

Good point about post-war GWR, my comments are more related to pre-WWII. Having said that I have a 1950 pic that shows a small sprinkling of very light roofs on a train of vans still, so not totally unfeasible. I posted a pic of the railmotor at Didicot showing just that sort of weather on it's roof, heavier at the engine end, very little at the far end. Also check out the clerestory coach at the front of the train in 1929. Surprisingly clean compared with the others! As Martin said, from the pics I have collected, they do seem a lot rarer on coaches though, not totally absent.

Never pure white (apart from when freshly painted) but a slightly weathered white and every shade of dirty grey in between that and absolutely filthy. This is a very misleading statement, how quick is "quickly"? I've seen some people (not saying you) suggest a matter of days without any evidence at all! There is plenty of photographic evidence to show that "white" roofs were a lot more numerous than people keeping repeating the same old memes that you would never see them in service. Here's an Example of Taunton from Britain From Above website: Not every roof would be white, but then not every single one would be grey/black either. The key is variety. Also don't forget, that lead white is not a pure white colour, it's an off white to start with.

Given the state of the paint on the sides I doubt very much the roof is still white and it will be reflections/over exposure making it look that way. The small 5" lettering returned from 1936 onwards.

Personal opinion is the Railmatch is a bit too light really, the Vallejo looks much better to me. Weathering with a dark wash should tone them down nicely.

I think the uproar in the replies to these is probably funnier than seeing them on a layout.