I have posted this tip many times.
If you encounter a paint that is resistant to Super Clean/Purple Power, like cured lacquers can be, sand down to the primer in 6 or 7 spots and let the chemical attack the primer. No primer I have ever used is resistant to this stuff. The chemical (lye I believe) will attack the primer and the paint will slough off like snake skin.
If you used Testors One Coat Lacquers without primer, 91% alcohol is very effective.
Between these two products, you should have no problems stripping anything and they are easily disposed of when it comes time.