Wetsanding the primer/ finalizing before paint...Questions [Archive] - Chevelle Tech

: Wetsanding the primer/ finalizing before paint...Questions


Huck2020
Jun 21st, 01, 2:20 PM
I've wetsanded the whole car, but I'm gonna go back over it again. I sort of slacked up on the edges, for fear of burning through the paint. But I should definately make those slick, right? However, there are a few very small places where I did burn through to the metal. That won't matter when I put the paint on, right? They are very small..

How slick does the car need to be? I'm wetsanding with some 400 grit. It's feeling pretty slick... but I'm willing to do more if it's gonna improve the overall product!

I'm painting Monday! I went and got some PPG Concept single stage urethane... in glorious butternut yellow!

I plan on putting 3 coats of it on... is that acceptable?

So, guys... tell me what I need to know, any extra little secrets or whatever... The product is coming along!

normie
Jun 21st, 01, 3:20 PM
I would suggest covering those bare spots back up with primer.. Otherwise you may have an adhesion issue.. and could affect your final outcome.. Sorry to tell ya that bro. 400 is great for final paint. make sure Everything is clean and grease (your hands) free.. 3 coats is recommended I believe.. You may want to hit it once more for good measure! don't forget you will be blocking the car again after paint.. usually equates to 1 mil, or about .5 to 1 coat of paint.. you don't want to be thin and go through to primer.. Good Luck!! Wait for JimmyP or martinsr to respond before heeding my words http://www.chevelles.com/forum/biggrin.gif

MARTINSR
Jun 21st, 01, 6:59 PM
You are right on again normie. If these spots are real small like the size of a pencil eraser head spraying top coat over it is not a realy big deal. But, is is so easy to just dust some primer over it. Even an etch primer (ok, it isn't really an etch primer but they call it that) out of an aerosol can. It goes on very smooth and you do do it right before painting, without any sanding after, unless it needs it of course.



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1965 Buick Gran Sport Convertible
1965 Buick Skylark H/T
"Fan of most anything that moves human beings"

Brenden Saylock
Jun 21st, 01, 10:27 PM
I always seal my cars with reduced epoxy prior to paint this makes the car one color and covers any bare spots. Plus it basicaly stops you from running the first coat. If your planning on rubbing the paint I always go four coats of single or clear coat.

AlMyPal39
Jun 21st, 01, 11:55 PM
Reprimer the bare spots. Make sure you clean the sandpaper often. The little dust balls that build up can sand scratchs in the primer. When ever I wet sand primer, I always use a guide coat.

MARTINSR
Jun 22nd, 01, 7:19 AM
In my post above, I left something out. I was refering to an "aerosol can" of etch primer when I said that it wasn't "REALLY" etch primer, sorry.

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1965 Buick Gran Sport Convertible
1965 Buick Skylark H/T
"Fan of most anything that moves human beings"

normie
Jun 22nd, 01, 11:11 AM
Brenden, You over reduce epoxt primer and shoot just before topcoat? Have you had any issues with shrinking? I mean it's a really good Idea, but isn't the reason you wait 2 or so days before topcoating epoxy because of shrinkage and cure time? If this issue never arises I guess that will be the way too go.. since epoxy is a bit thicker than top coat you have a less likely chance of runs and sags.. what do you over reduce at 10-15%?? Thanks

red2rider
Jun 22nd, 01, 5:27 PM
Brendan I would cover the bare spots and sand them again. The main reason I never spray primer and then shoot the color without sanding is if you get a chunk of junk in the primer and miss it. It might show it's ugly lil head when you wet sand and buff the color. Plus it'll give your topcoat better adhesion and less orange peel.
Of course if you have a dedicated spray booth like most of us don't, then contaminates aren't an issue. Final sand and shoot is what I would do just to be safe..

RandyB..
www.angelfire.com/ky2/mycars (http://www.angelfire.com/ky2/mycars)

red2rider
Jun 22nd, 01, 5:31 PM
Oh yeah, one more thing. Wash it down really good, cracks and all to get the dust out. Let it dry and help the jambs with a air nozzle to free any hidden water and dust. Let it dry, Tape it up and tack cloth the hell out of it before you shoot it.

70L34
Jun 22nd, 01, 5:32 PM
Huck,
I don't have any advice to lend, just wanted to say that I am impressed that you have come this far with your car situation. That is just awesome man. Painting my Caprice was one of the biggest, most rewarding accomplishments that I have ever completed. It's a great feeling to know that you did the whole damn thing yourself. No one will believe you!
Hey, my Chevelle is finally done! Good ol' Torch Red. I ended up spending a pretty fat chunk of change to do it, but you get what you pay for, right (not trying to bring up open wounds, man!). I'll drop you a few pics when I go down to pick up the car next month.

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Tony Nausieda
1970 SS 396-4??hp
Frame-off Resto, presently being painted, NOT stock but looks it!