What’s the best way to treat these rust spots on the sheet metal? Wirebrush/sand the rough stuff and apply somehthing like rust encapsulator or take it down to bare metal and apply a primer? What about where it comes in contact with paint over good metal? We’re going to do a frame-off within the next 3-5 years, but I have these spots popping out all over the truck and I want catch them before they get worse. Specific Eastwood product recommendations would be awesome. Thanks!