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Old 09-04-2010, 03:04 PM
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Painting/Polishing Techniques for backyarder?

Hey guys, first time here in the body section, sorry if its been asked before. Everywhere I look people seem to have different opinions. I sprayed the primer on my car yesterday. Its a basecoat/clearcoat job. 2k primer went on and I'll be blocking it back over the next week and spraying colour/clear in next 2 weeks. Now, I am trying to do it all dry sanding. I've always done wet/dry every other time. Any disadvantages/advantages of doing it dry over wet? Every other car I've done was sand primer with 360grit, spray the colour then clear and leave it as is as never had a polisher. My base this time has a lot of pearl in it so I want to polish it. Now the questions:
To get the best finish what grit paper should I use to sand the primer? Any particular angle to sand. Previously sanded in straight line but was thinking about 45 degree angle on this one.
Was planning on sanding the 2k clear with 1500 then 2000 then polishing. What sort of polisher do I require, rpm wise as I have read if its spins to fast can cause damage. Any special secrets to the polishing stage? Thanks for your time..Paint is a Nason basecoat and a PPG Autothane High Solid Clearcoat. Cheap I know but paint is a lot more expensive over here..

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Old 09-05-2010, 12:31 PM
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if you have a base with alot of pearl and mettalics 600 grit is the lowest you want to go or you will see the sandscratches. i general use a 45 deree or x pattern just like when blocking, then use a grey scuff pad and a scuffing agent to clean and knock down some of the sanding scratches. i normally don't use 1500 unless i have a really bad spot. i go with 2000 blocked. the use 3m trizactit 3000 on a d/a then use their compounds extra cut /wool pad, trizactit/ white foam pad, 6068 ultrafine swirl remover/ blue foam pad, then wax. they are all part of the 3m perfect it polishing syste. hasn't failed me yet. oh yea i always dry block 320 long board the 600 wet
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