Basically you do it when you are in the window where you are making your post. I think I put instructions in the Help forum, also there is a FAQ
(see where it says FAQ top right)
I have a few cabinets that I have been saving for this type of repair. I was going to attempt to mix the brown powder (available from mowhawk furniture supplies) into two part epoxy resin. Bondo and other body fillers will work and if you plan to paint the radio this is a good way.
Painting a metallic color with a spray bomb is difficult. Metallic paint is hard to work with, you need to keep the metal particles in suspension.(stop and shake a little between coats) temperature is important, and the distance to the can, and speed, it takes practice.
I had some auto (acrylic ename) paint mixed the right color at lordco, to match my crosley D-25 ( greenish metallic) and put a clearcoat over it . I had to wash it all off and start fresh a few times before I was happy. I think the color may be similar to a colr northern electric used, an unusual green. I found the chip from an old 50’s car, in an old paint chip book.
The clear coat, I needed to buy from a body shop, (lordco wanted to sell a large quantity) I hadn’t worked with clearcoat much but evidently it is the way almost all cars are repainted now. putting on the metallic paint, and then doing the gold lettering on the front took a few tries, with washing / sanding thing clean in between.
Then the clearcoat didn’t go on as smooth as I would have liked. I sanded it with wet or dry, carefull not to go through the clearcoat, then rubbed it out with fine steel wool and wool soap. The results were quite impressive many hours later. the clearcoat did give a very nice sheen.