There were three different formulations of Floquil. The earliest that used Dio Sol thinner was most likely to attack plastics. The last formula could be used safely on most plastics.
Tru Color has a small amount of acetone in its thinner but its only about 5%. Acetone is recommended to clean your tools but not to be used as a thinner.
I have only used Scalecoat a few times. I have transistioned to Tru Color. It still requires a learning curve if you have only used Floquil but will give good results if you use their thinner. Most of the time I just use common lacquer thinner. Its OK to use on primed plastics or previously painted plastic. Don't use on raw styrene.
Pete
027 trains and life long painter
