Glad you enjoyed it!

Good stuff

I'm not sure. I noticed that paint on old matchbox cars is very hard to remove, even with Bartoline paint stripper. Nitro paint thinners have no chance to damage paint even if car was submerged in nitro thinner for more than two weeks. Newer Mattel cars as Hot Wheels and Matchbox have weak paint and it is very easy to remove paint. So I guess old cars have good quality tampos as well. It looks like entire paintwork is baked after painting or has strong clear coat over paint and tampos. So removing tampos or decals results in removing paint as well. I was not trying to remove tampos from old cars. Oldest was maybe from 1990s period. New cars looks like have tampos printed after base paint in an separate layer which is weaker than base paint.

Of course. The scale doesn't matter. Just make a test before you use acetone. Try to rub acetone on some part of your model that is not visible, to test how your paint reacts with this chemical. If it starts do destroy your paint than you can't use it.

Ok thanks

I tried that method but acetone works much faster. Also whiteboard pen (or dry erase markers) can stain the paint and can be pretty messy job.

No if isn't in contact with acetone for too long, like 10 minutes long. If you only remove tampos you will not damage the paint.