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  #1  
Old 10-21-2010, 08:09 AM
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uk_figs uk_figs is offline
 
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Default Quick paint prep question

Prepping my -7 for paint this winter and going with the PPG Concept paint with K36 high build primer. I am using the raw epoxy approach for pinholes on the cowling prior to the primer application but wondered what I need to do on the gel coated wing an tail tip parts. Do I need to sand and epoxy coat and then prime or just sand and roll/shoot the K36 primer.
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  #2  
Old 10-21-2010, 09:01 AM
PainterJohn PainterJohn is offline
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Default

definitely sand it first.
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  #3  
Old 10-21-2010, 09:32 AM
szicree szicree is offline
 
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Default

Clean thoroughly before sanding (and after). There is probably release wax on the gelcoat and sanding will just drive it in. Ask how I know.
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  #4  
Old 10-21-2010, 09:45 AM
Transporter Transporter is offline
 
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Default System Three Clearcoat

I recommend a 12 oz kit of Sytem Three Clear Coat epoxy for pinhole filling.

It's epoxy, but is very thin and gets into the pinholes well. Designed as a moisture barrier coat for below the waterline on boats so it's tough enough for our purposes.

Available from a variety of sources; one source is Woodcraft (www.woodcraft.com) Item #144501

Good luck,
Mike
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  #5  
Old 10-21-2010, 01:35 PM
RVadmirer RVadmirer is offline
 
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Default Dan H.

Dan has explained this process very carefully and in great detail. Check the archives with the search function. You probably have everything you need already......
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  #6  
Old 10-21-2010, 08:04 PM
Ken Ken is offline
 
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Location: Lafayette, LA
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Default K36

A really good primer. You might try the optional mix using paint. It covers very well and still builds and sands well.

Ken
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  #7  
Old 10-21-2010, 09:09 PM
float208 float208 is offline
 
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Location: Chandler, Arizona
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Default K-36

Its pretty simple, sand with 180 on a DA, roll the K-36 on the cowl/fiberglass pieces, then squeege it back and forth filling the pinholes. Sand and repeat if nessessary, but usually one or two passes filss everything. bigger holes can be filled with glazing. I sand the gel-coated pieces with 180 on my DA to remove the cloth weave and shine, then spray with the K-36 a nice heavy coat. Come back and fill the pinholes with 2 part metal glaze. Sand down smooth and recoat. Usually 2 applicatins will create a flawless surface.
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  #8  
Old 10-22-2010, 07:25 AM
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uk_figs uk_figs is offline
 
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Default Optional mix?

Quote:
Originally Posted by Ken View Post
A really good primer. You might try the optional mix using paint. It covers very well and still builds and sands well.

Ken
Not sure I understand what this means?
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  #9  
Old 10-22-2010, 09:05 AM
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Default Look at the mix ratios...

Quote:
Originally Posted by uk_figs View Post
Not sure I understand what this means?
...in the data sheet....

http://classicchevyclubreno.com/Gara...r_Surfacer.pdf

It allows (one option) mixes with PPG color paint.

This version of the data sheet calls it "tinted primer surfacer"

http://www.tcpglobal.com/kustomshop/...OCS/P-169P.PDF
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  #10  
Old 10-22-2010, 10:07 AM
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uk_figs uk_figs is offline
 
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Default Purpose of tinted primer

What would be the purpose of the tinted primer approach, I assume mixing the topcoat color would change the color of both so is this to get the primer color closer to the finish color?
As I understand the PPG paint process from reading the archives I will be shooting a epoxy primer surfacer over the plane and then the topcoat, does the tinted K36 take the place of the primer surfacer (DPS 3051/55) for the fiberglass parts?
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