My cowl screens had some over spray on them from a previous repaint. I soaked them in old brake fluid to remove the paint. They were slightly discolored so I misted some trim black on them. Not OE but they look good. They are in a dimly lit area so you can't tell there's paint on them.

After power washing the undercoating off the splash shields, they were in good shape. They will get sprayed with more undercoating so I didn't go crazy with them.