Paint Primer Question

bocephus1991 · #1 05-02-2011, 06:17 PM

I was wondering ,has anyone ever used spray can self etching primer and a HVLP paint gun to paint with? Or is this a bad idea? Should I just use a paint gun for both?

truckntran · #2 05-02-2011, 07:27 PM

I would be more worried about the compatibility of the paint than the spray can/ gun debate. Ask your paint supplier if your topcoat will work with the spary can primer. I once painted a car when I was a teenager, did all the primer work with spray cans, and when it was time for the topcoat we hired a guy to spray it. He gave it a coat of automotive sealer and promptly lifted a lot of my primer spots.

SOunds like a test panel is on order if the paint supply house can't answer your question. I like the idea of spray can self etching primer tho.

bocephus1991 · #3 05-03-2011, 05:31 PM

I talked to the paint guy at my napa today and asked if the self etching primer in a spray can was compatible with the top coat and he said yes it would be fine. Does anyone else have any thoughts or knowledge to share on this? How about reducer how much do I use per 20oz of paint? and how much hardener for 20 oz of paint?

truckntran · #4 05-03-2011, 07:30 PM

There should be mixing instructions on the can... but it will be how much per quart or gallon.. You will need to figure out the percentages, or fractional mix.. (That's right the Math you thought you would never need again...lol)

If for instance, it says one can of hardener per gallon of paint.. and it is a pint can, that would be a one to 8 mix... or in other words you need to use 12.5 percent of the paint volume in Hardener.

Reducer would be figured out the same way although adding it until the viscosity is correct would be more precise, if you have a viscosity cup.

What also works well is a paint stick with measured and marked lines for the paint, reducer, and hardener. Fill to the line, with each in order. You can eyeball it in the cup but measuring a stick is more accurate..

green 4 acres · #5 06-13-2011, 11:42 PM

I have used Auto Zones spray can self etching primer which is military primer I use it were ever I do not want rust be careful and use a resperator system I painted a air plane frame with 4 cans outside in a light breeze , stayed up wind ,with a mask and goggles and had problems for weeks

Don

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cubpsycho · #6 07-10-2011, 07:29 PM

Quote:

Originally Posted by bocephus1991

i was wondering ,has anyone ever used spray can self etching primer and a hvlp paint gun to paint with? Or is this a bad idea? Should i just use a paint gun for both?

napa paint is good, expensive but good, they give a large paint/hardener mixture chart with the purchase