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Correct Primer for bare metal

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Morris Krodle

07-17-2012 13:00:22

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I just tore down my "B" Farmall and have sandblasted all the parts to bright metal. One painter told me to use 2K urethane and another say to use expoxy. What"s best for doing the job right?

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Chuck murley

07-31-2012 18:03:03

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 Re: Correct Primer for bare metal in reply to Morris Krodle, 07-17-2012 13:00:22  
I use a dtm primer(direct to metal) daily in my body shop. Saves some time and money. If you use 2k/ urethane primer you should use an etch prime first. Not to familiar with epoxy thats made today,the older epoxy was strong as hell but like everything else its changed. Hope this may help.

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07-31-2012 18:25:55

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 Re: Correct Primer for bare metal in reply to Chuck murley, 07-31-2012 18:03:03  
2K urethane as a primer would be last on my list. Epoxy is always first. I consider 2K urethane to be a surfacer, not a primer. But, PPG says the same thing as you do. If you have to use it, sand and etch prime first.

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07-17-2012 18:19:59

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 Re: Correct Primer for bare metal in reply to Morris Krodle, 07-17-2012 13:00:22  
I did some searching because I am not familiar with 2k urethane. :oops:
I found this:

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Looks like the popular opinion is two wet coats of epoxy and then 2k high build (at least on the hot rod forum I found in Google)

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07-17-2012 19:17:00

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 Re: Correct Primer for bare metal in reply to sflem849, 07-17-2012 18:19:59  
2K urethane is not as good as epoxy on bare metal, I have no desire to use it. However the spec sheet for the PPG version says that if it is used on bare metal, the metal must be sanded AND etch primed. That tells me not to use it on bare metal.

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Rod (NH)

07-17-2012 13:36:22

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 Re: Correct Primer for bare metal in reply to Morris Krodle, 07-17-2012 13:00:22  

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