Tool box has paint peel on the front panel directly below the bottom drawer. Factory paint is directly over bare steel using no primer. I've been able to match the factory color with factory paint as long as I don't use primer underneath. But now the repaint if flaking off after about 5 years. I'm assuming the repaint is not grabbing a hold of the bare steel as well as I had hoped. The section I'm going to paint is about 3 inches high by 33 inches wide. Also, what grit sand paper for the bare steel before primer? I got plenty of time to think about it since the weather is not quite warm enough anyway. Just throwing this out there.