primer
Thread Starter
Heel & Toe
Joined: Oct 2011
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From: curtis Tx
Melting Slicks
Joined: Jul 2009
Posts: 3,264
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From: Vero Beach FL
If you are going down to bare glass I would shoot it with epoxy primer first before using a high build primer. SPI is one of the best epoxy primer. Do a search here on SPI primer and see what you come up with. 
Le Mans Master
Joined: Jul 2006
Posts: 8,117
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From: charlotte north carolina
as roco71 mentioned spi is a good choice, because it has a 7 day recoat window. that is, you can respray it up to 7 days later without resanding- a plus for weekend warriors.
Melting Slicks
Joined: Feb 2007
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From: West Kingston RI
Pro
Joined: May 2011
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From: BC
Steve g
Drifting
Joined: Dec 2004
Posts: 1,714
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From: Austin Texas
I used a brand called U-Pol below is a link to the exact product. I have no complaints.
http://www.u-pol.com/product-cat/30/...r-%2841%29.htm
It is a 2K high build primer. For the first coat I mixed in 2 parts of reducer to create a sealer. Then subsequent coats got 4:1. The data sheet has the different recipes for the mix.
http://www.u-pol.com/product-cat/30/...r-%2841%29.htm
It is a 2K high build primer. For the first coat I mixed in 2 parts of reducer to create a sealer. Then subsequent coats got 4:1. The data sheet has the different recipes for the mix.
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Melting Slicks
Joined: Jun 2009
Posts: 2,709
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From: Savannah GA
Epoxies seal better than polyesters or urethanes (my considered opinion only) so I used it on my 1977 since the car was rust proofed when new and the body is pretty impregnated with the waxy shyte they sprayed back then. I washed twice a day with Dawn dish soap for a solid week after stripping but still got some fisheye in my first coat of epoxy. A good double wet coat before fill priming can provide some comfort margin if you think there's contaminated glass on your car.
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Epoxies seal better than polyesters or urethanes (my considered opinion only) so I used it on my 1977 since the car was rust proofed when new and the body is pretty impregnated with the waxy shyte they sprayed back then. I washed twice a day with Dawn dish soap for a solid week after stripping but still got some fisheye in my first coat of epoxy. A good double wet coat before fill priming can provide some comfort margin if you think there's contaminated glass on your car.
Contaminates can come from the underneath side of the glass and cause "mystery" issues with the paint.
Melting Slicks
Joined: Aug 2008
Posts: 2,200
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From: Lehigh county Pennsylvania
Advanced
Joined: Mar 2013
Posts: 66
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Epoxy primers are used primarily for their adhesion properties, in particular with bare metal. Either an etch or an epoxy has to be used before anything else goes on bare metal. On a fibreglass body adhesion to the high build polyesters is not an issue and that's why it's not used.
Steve g
Steve g
Burning Brakes
Joined: Jul 2008
Posts: 914
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From: Brooklet Ga.
If it has a lot of dips and uneven places I would worry about fixing them and getting the body straight before I was worried about primer. After I have my body work done I go with an epoxy primer to seal it up and then a 2k high build primer before paint.
Advanced
Joined: Mar 2013
Posts: 66
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I agree with somethings you said a high build primer will take care of the chips only. Not misaligned body parts. Good job Skip
