For painted, raised panels, I simply mask off the area in question. I apply masking tape, in layers, to the desired depth. Using automotive high build primer (Rattle cans), the area is sprayed, in several coats, until the desired depth is reached. The painted is then sanded, and the tape removed.

This can be done, directly over your doped finish, as the prime is lacquer based, and will adhere well.

If you look carefully, you may be able to see yhe raised edges on the stab.