924Board.org

[-nick]

while we're on the topic of painting (nice work so far Joe) I was wondering what the consensus was on 1000 grit paper. is it worth the extra step? i'm up to 400 grit right now. i've got all the chips and scratches and everything else taken care of and i'll be attacking the car with 600 grit tomorrow. will a quick bout with 1000 make any difference?

the sealer/base/and clear are coming soon...

thanks
-nick

[Joes924Racer]

Im just starting that phase there wonderen the same
thing there myself..just depends on the thickness and smoothness
and amount you have down now or what how smooth it is now
as far as there being any deep scraches or gouges seems if thats
so I dont see why not.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

[wdb]

yes it makes a big difference. I havent painted any cars but I have refinnished furniture , and the smoother the second to last coat of paint and clear coat the higher the gloss will be . experiment with a few small piece's of wood or sheet metal , do 1 piece up to 600, and a 2nd up to 1000 , and you'll see the difference . the pro high end paint shops take it to 6000 grit , then 2 or 3 grades of polishing compound , for a mirror finnish . for a few more dollars in sand paper and a little extra effort ,you can have a concourse quality finnish .

[wdb]

a few other things . if your body work isnt perfect ,the dark colors will show any imperfections ,dents,dings or waves in the filler . so if your planning on using a dark color , wet the car, and in bright sunlight , inspect high and low from different angles , cause you sure will be pissed if after all your effort and a great paint job you find a glaring obvious flaw ,that makes the whole car look like a junk yard refugee with an amature paintjob trying to hide defects . you might even consider using black primer ,to make it easier to spot any problems . oh and on those practice pieces of wood , you might try thinning the final coats of paint and clearcoat as much as the spray gun will tolerate , for the smoothes finnish . closely follow the paint etc, guides for time between coats . and if you see dust or dirt collecting on the car ,DONT TOUCH IT ,you'll smear the finnsh or leave an ugly finger print ,the dirt will wipe off when the paint is dry ,or worse case, a wet soft cloth to GENTLY buff it off .

[Joes924Racer]

its good to know what scratches wont be removed with buffing.
I hear going to 1500 grit is best.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

[-nick]

i should have mentioned that the paint system i've got doesn't require the color coat to be sanded (i don't think many do nowadays). i know that 1000+ grits are usually used in that sort of situation. all i have left is to finish sanding the old paint and primer touch-ups before the sealer gets sprayed, then the color coat, then the clear. none of these coats get sanded.

i'm going to stop down to the paint store and talk to the folks there, they no more about painting than you could believe!

-nick

[Joes924Racer]

most of the good ones do with painters runnen around. ready
to share and laugh with you.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

[bluejayfan]

If you're sealing the car 1000 grit isn't needed. Most sealers are fine over a 320 grit scratch. Anything between 400-500 is perfectly fine. In fact you only need to 1000 if you plan to paint (not seal) directly over the old finish. As for sanding the clear when you're done: use 1200-1500 depending on how much peal you put into it and finish with a run over with 2000 to lessen the amount of buffing!!
_________________
78 924 - The eternal project car

[Joes924Racer]

yea nick thats where Im at finish sanding and more sandable primer follwerd by a sealer.. ...

...just thought id mention those pinstripes I removed from my car were a chore I still have a few gouges I have to fix on the hood and body mostly around the rear windows on the sides. then I was planning on a sealer then the color coat

..great bluejayfan good info. to know
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

[Vince Ponz]

Pre painting is the easy part. Wait until you sand it with 1000 and then 2000 grit. Painting is easy but the prep and final is a bear.
I just sprayed mine this weekend and I am using 1000 grit then the 2000 and it took me a couple of hours just to sand half the top the rear right panel and half the back end. Looks nice but I have a long way to go.

Should be finished by the end of the week. Hint when sanding the final paint stay away fron all edges, do them seperately and slowly. If not you may cut through the paint. I tried my best and still hit a spot that I have to respray.
_________________
"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

[Joes924Racer]

Are we all painting now. its raining here. Like they said it was going to.
not alot of rain just a drizzle though its all day dark and overcast. All I know is alotof things have to be set -up perfect.. item to spray sanded correctly
condition of spary are..setup of spray equipment and paint mixing. If its not right stop and fix it
Vince is right and wrong if the paint mixed correctly and the guns setup right
should be a breeze.

Towards the end of the sandable primer I mixed it a little thin
and wow could I tell the difference in the way it laid down.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.