Dennis i put new gold grille cloth from VG over my ruined grille and it
looks good .

Those grille plastics are plexi i believe you may be able to remove the
paint . start with goof off cleaner .. this cleaner will desolve paint
slowly but will not remove lacquer so it may work on those plastics
unless they painted the back side .

It seems very strange someone would paint over those beautifull colored
plastics