Is it normal to "WET SAND" (PPG) K-36 primer with 320 grit? I've never heard of wet sanding "sandable" primer. Is this OK? Will it have any adverse effects on the final outcome of the paint job?

Also, Have you ever heard of "Sikkens" polyester (sandable) primer? It's similar to the old "Eliminator". Is it any good?

Tips?

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Dale
Lowered '67 Elcamino
ZZ430HP / 4L60
"Canyon Carver"
www.chevelles.com/showroom/elkydriveway1.jpeg (http://www.chevelles.com/showroom/elkydriveway1.jpeg)

My $400 '93 FireBird
http://www.chevelles.com/showroom/D:%5cMyPhotos%5cFireBird.JPG

You can wet sand urethane primers without a problem, though the repaint "window" is narrowed. I don't have a PPG tech sheet on K-36 but other urethanes by DuPont and Sherwin-Williams have a recoat window of four to six or so hours after sanding, when you wet sand that closes down to one to two hours. As far as the polyester primer, The Martin-Senour (available at NAPA) is SUPER! It sands hard, but you just have to treat it like plastic filler (bondo) because that is what it is! You can bury a quarter on your fender with it! It will fill 36 grit scratches with one coat! with no shrinkage. And I have seen tests with flexibility and it holds up great.

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Fan of anything that moves human beings that is interesting.

I thought PPG high build primers such as K-36 & K-200 had a larger window for repaint of about one week or longer?
I know the DP74 has a 72 hour window or scuffing will be required prior to painting the next coat.
The K-200 having a longer pot life than the K-36 which is preferred in production shops due to it's faster drying time.

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Dale
Lowered '67 Elcamino
ZZ430HP / 4L60
"Canyon Carver"
www.chevelles.com/showroom/elkydriveway1.jpeg (http://www.chevelles.com/showroom/elkydriveway1.jpeg)

My $400 '93 FireBird
http://www.chevelles.com/showroom/D:%5cMyPhotos%5cFireBird.JPG

Problem solved: Thanks Skip!!!
After the urethane primer is completely dry,(so as not to shrink any more) dust a light guidecoat over the primer, and break out the 400 grit and wetsand (by hand) the primer until it is as smooth as glass. Use a rubber sanding block and sand in one direction only. When all of the guidecoat is gone you're ready to spray the first coat of base.The primer should actually shine at this point.

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Dale
Lowered '67 Elcamino
ZZ430HP / 4L60
"Canyon Carver"
www.chevelles.com/showroom/elkydriveway1.jpeg (http://www.chevelles.com/showroom/elkydriveway1.jpeg)

My $400 '93 FireBird
http://www.chevelles.com/showroom/D:%5cMyPhotos%5cFireBird.JPG