POR 15 is designed specifically to be painted over rust (hence the name
POR). You just need to remove the loose rust and the paint. It dries hard as a
rock and it get more durable with contact with moisture. It is a great 1st coat
if your dealing with a rust repair or bare metal. The shortcomings are :1) It
is dangerous to spray without full protection, 2) It breaks down under
sunlight, so it needs a top coat if it is exposed, 3) If dries on your hands
it
take weeks to get off/wear off.
It is great for chassis and wheels and it is a great rust treatment for
existing repairs. It is unbelievably tough and durable.
Steve G.
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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