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Old 01-10-2010, 08:58 AM
CamaroX
 
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Some Paint Questions (sanding clear coat etc.)

I was looking at doing a paint job with one of the affordable brands Kirker, Eastwood, Summit etc. (Which in my research may all be the same paint). I had a couple questions.

First in summits instructions they indicate that you can sand your 2nd to last layer of clear coat with 600 grit. Then spray one final coat of clear that is over-reduced to get an extra glossy finish. I've heard of people doing the over-reduced step to cut down on orange peel but never anyone wet sanding like that. Has anyone done that?

My second question is in mixing the clear with the basecoat. I also know you can mix the clear with the basecoat to bring out an extra deep shine. Building your way up from a 50/50 mixture of base/clear, 25/75, 10/90. Will this work on a mettalic color as well or should I just stick to spraying coats of base then clear not mixed.

Hoping to do this paint job this summer and it will be my first big job. I've done the dash in base/clear on the 69 and a few panels on my 98 Camaro so im excited.

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Old 01-10-2010, 12:42 PM
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Since you stated that this will be your first big job I would stick to just spraying the base without clear mixed in. The only way I would sand the second to last coat of clear is if I had excessive orange peal. Some people frown on over reducing the clear, some swear by it. I over reduced the final coat of clear on my 34 by about 2% and it worked out great. The last coat went on like glass with very little orange peal. Be advised however that the over reduced clear is quite a bit easier to get a run in.


Vince
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Old 01-10-2010, 07:03 PM
Chris Ryan
 
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I would not over reduce the clear. There are chemists and people smarter than you and I that devlope these products and the instructions to use them. I do believe in general that it will flow better with more reducer, but it may also present other problems (dieback etc..).
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Old 01-10-2010, 08:16 PM
CamaroX
 
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Quote:
Originally Posted by 48cad
I would not over reduce the clear. There are chemists and people smarter than you and I that devlope these products and the instructions to use them. I do believe in general that it will flow better with more reducer, but it may also present other problems (dieback etc..).
Well it does list in the actual instructions you can overreduce the last coat but it says to sand the previous coat before which is what confuses me.
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Old 01-10-2010, 08:43 PM
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Flow Coating

The process of allowing your clear to dry then sanding and spraying a slightly over-reduced coat of clear on is called flow coating by most custom painters. Done correctly it works great and you can get incredibly deep and smooth finishes. The sanding of the clear allows it to breath and gets out residual orange peel and when you re-apply the clear it flows like glass. It can save you a lot of polishing.

As for adding clear to your basecoat, I wouldn't recommend it. If it is a true auto refinish basecoat you would never add 2K clear to it. Some sell 2K single stages as basecoat which can be blended with 2K clear for added depth. However, these type finishes don't offer the advantages of true basecoats like easier application of metallics/pearlescents, fast dry times (less dust particles), less chance of sagging, and reduced orange peel.

If you are on a budget and want a true refinish basecoat/clearcoat system I recommend product from www.thecoatingstore.com. They have some nice stuff at a great price. I use them regularly because the price is right, the coverage is really good, and it holds up well for me.

good luck!
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