need help from painters, question about k-36 primer

I'm using ppg k-36 primer for the first time. Can the second coat be applied over sanded thru spots without causing lifting or do the sanded thru areas need to be sealed first?

It's k-36 over dp-74

Thanks

 

Never had a lifting problem with k36. If you break thru to bare metal, then a little etch prime on the bare spots is a good idea

 

Thanks tinbender I was hoping it wouldn't be an issue but just wanted to make sure.

 

Agreed. You'll be sanding over everything anyway, so laying some etch over the bare metal followed by another coat of K36 won't hurt.

 

I'm not a fan of etching primers, old technology. Epoxy is the way to go over bare steel today (my opinion). I believe k36 can be applied over bare metal. If you only have a small spot that u cut thru and do not want to epoxy it, I would just shoot the k36 on it and move on.

 

I'm going to spare the epoxy vs. etch debate on this one...

If the spots are small, like smaller than a dollar bill, I wouldn't worry about and just K36 right over it.

 

i used k 36 for years, after switching from k-200.

dont sweat a few bare metal spots, just re-coat. the etch certianly wont hurt either, but not required.

my willys coupe is 12 years old on k-36, no cracks or shrinkage.

skull

 

Thanks guys!! They are just small spots. I was just worried about it lifting. I used something a few years ago that would lift everytime you reapplied it. You had to put a sealer on before you could recoat.

I don't remember now what it was but it was a real pain in the ass. Just wanted to make sure I wasn't going to run into that with the k-36.

I couldn't find any mention of it on the ppg website but as usuall the HAMB comes thru with the answer!