if you spray clearcoat diretly on bare metal, it will not adhere properly, and will explode within a year or two. it's a TOPCOAT, it has no corrosion protective properties.
when applied over questionable paint, regular clear will slow the deterioration of the paint under it, but still might turn into a cluster.
instead, I used a new product that was previously only available in black.
it's Wurth Rust Gaurd Clear.
it's made to apply over rust, and kill it. similar to PUR 15 or whatever.
I reduced it 10% / prepped the bare rusty metal with 80 grit (rough!) and shot it.
for your application I would wet scuff the car with a grey scuff pad (1000grit) and soapy water
then dry, tape and shoot.
after it dried I scuffed the clear with a grey pad to kill the shine
Last edited by biGshiz79; 08-20-2012 at 05:31 PM.
Bodyman, painter, frame guy.. basically I hit sh*t with hammers..