Dave v. I am sure my part is fully rusted through, would you be interested in selling one of yours and provididing a photo ?Now I see what you mean by bumps..if you were going through customs, they'd have to open that up. That probably is rust that is at full blossom, behind the vinyl. Never seen that...I have a few sets, and all have a little oxidation, but you might want to start with a set that's a little better. Are the fronts in similar condition?