How much SPI Epoxy Primer and Epoxy Activator will I need??

Discussion in 'Body Restoration' started by NYH1, Dec 21, 2010.

  1. NYH1

    NYH1 Veteran Member

    Feb 27, 2010
    Central New Yorkistan
    How much SPI Epoxy Primer and Epoxy Activator will I need to do my whole car. By whole car I mean, the complete exterior of the car, the door jams, the bottoms and back sides of the doors, the bottom of the trunk lid, the area under and around the trunk gasket, the fenders under the hood and in the engine compartment area.

    Would 2 quarts of Epoxy Primer and 2 quarts of Epoxy Activator be enough? That would be a gallon of useable Epoxy Primer correct?

    Thanks, NYH1! :bowtie:
  2. motorhead76

    motorhead76 Veteran Member

    Oct 16, 2008
    Most primer doesnt mix 1 to1 you will have to see what the mixing ratio is.Depends on how many coats you want to put.Are you going to prime it b lock it and then prime it again? I prime everything twice.It will probably take a full gallon and then whatever you mix it with. What is the mixing ratio?
  3. kawboy

    kawboy Veteran Member

    Apr 2, 2010
    SPI epoxy is 1:1. If I were you I would buy 1 gallon of epoxy and 1 gallon of activator. That way you don't have to worry about not having enough to do everything and skimping in some areas. Then if something happens you will also have enough without buying more. Also if you price it buy the quart and by the gallon it is a much better deal to buy it by the gallon.
  4. BusDriver

    BusDriver Veteran Member

    Apr 28, 2004
    Charlotte, NC
    SPI is 1:1

    I'd get at least a gallon of each part, that should get you most of the way.
  5. bobbin

    bobbin Veteran Member

    Jul 14, 2008
    Depends on how many times you want to prime. But 2 gallons of primer should be more then enough to cover everything.
  6. boardog

    boardog Veteran Member

    Dec 8, 2006
    north ga
    2 gallons of sprayable material will be close. depends on thickness, number of coats, spray gun, tip size. if you are shooting everything inside and out and have a 1.8 or a 2.0 tip in the gun you might wind up short.
  7. blazerman

    blazerman Member

    Jan 16, 2009
    I just finished doing this, 2 gallon kits are what you need. This gives you enough to do final seal before paint. Just a word of warning, if you are working in a cold environment be sure to get the metal temp over 65 degrees or it will take forever to dry - not a knock on the product, just passing on my learning experience
  8. NYH1

    NYH1 Veteran Member

    Feb 27, 2010
    Central New Yorkistan
    Thanks for all the info guys.

    I have to weld in a few patches. Nothing major though. I'll clean all the bare metal areas per SPI's instructions and with their products. Then I'll spray epoxy primer directly over all of my bare metal areas. As well as spraying it over the entire car. Before applying any body filler. Once I get the body filler sanded down to wear it needs to be, I'll spray SPI's high build primer over the whole car and block sand it out. Then I was thinking about spraying one final coat of epoxy primer over the whole car to seal it. Then I might have to spray a regular primer after that. Then have the color sprayed on.

    Does the above sound correct? I'm not a body/fender/painter by any means. Just a guy on a very tight budget that REALLY WANTS to learn and do as much of the work that I can do on my car. PLEASE feel free to correct me if I'm not heading in the correct way. It'll be GREATLY appreciated!

    Thanks, NYH1! :happy:
    Last edited: Dec 22, 2010
  9. 77nomad

    77nomad Veteran Member

    Nov 20, 2009
    Ski Town
    I got a gallon of SPI. Its cheap enough to not really matter.
  10. Blu-By-U 79Z

    Blu-By-U 79Z Veteran Member Lifetime Gold Member

    Feb 11, 2009
    Some epoxys can be used as primer or sealer. So if SPI can be thinned and used as a sealer then you wouldnt have to do the last step primer. Just finish body work. Seal and spray your color. Sounds like you got the rest down pat.

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