In the mid '40's, when painting the Model A, Chief and I applied heavy grease very carefully to the windows with a wide putty knife, greased all the chrome, and sprayed away!! Grease was removed from the windows with a razor blade scraper, then wiped with a damp solvent rag.I've got a trick for painting the insides of the drum. Take a thin coat of grease and put it where you don't want the paint. The paint won't stick to the grease, and you can take some lacquer thinner to it when you're done. It also works on decals you don't want to paint.
Red