Hey all.
Im just about to pick up an original front quarter panel with almost no rust just some surface rust on the inside.
Mine is poo'd in the usual place at the bottom.
My question is how i should remove the surface rust from the inside without removing to much metal and then how to preserve this rarity for future generations.
I have a really sweet circular wire brush that goes on the end on my angle grinder that does a beaut of a job for almost everything but im wondering will it take off to much??

Also what do people think of that fish oil spray stuff in the can for rust prevention? Or that rust killer that turns rust into black primer? what can i use CHEAPLY to preserve.
Any help is much appreciated.

P.s. i hate those taiwaneese pieces of non-fitting crap