I've had an utter disaster!
This is the first coach I've repainted and subsequently attempted heavy weathering on. The Zero paints green was gorgeous once it was gloss varnished with ZP's own lacquer. I then applied all the lettering transfers and once they were hardened, I sprayed a couple of coats of neat Winsor & Newton matt varnish to give the weathering something to cling to. I then applied my own enamel weathering mix and then tried to remove it in patches over the insignia as the SBB was wont to do in the sixties and seventies. I've done this on factory finishes and it's worked a treat. This time however...
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As the enamel thinners I was using dried, these white deposits began to show up and wouldn't come off. They just got worse the more I tried to remove them. I thought the thinners might be reacting to the glue of the transfers so I tried the same thing further down the coach side and you can see the result. The second class markings at the left hand end is how it started. This is a write-off and I'm going to have to find out what happened before I attempt this again. I think it might be the enamel thinners reacting to the Winsor & Newton varnish but I won't know for sure until I run some tests on scrap plastic sheet. If it is then I'm not sure what to do because the transfers need to be lacquered to protect them but at the same time it can't be removed by the thinners treatment that creates the patches. The ZP lacquer will probably attack the transfer film so I'm open to suggestions of what lacquer to airbrush on that can give me the (probably satin when I think about it) finish I need to do this that won't then react with thinners and create this mess.