MP170(Epoxy Primer) P-Sheet Info. - Hot Rod Forum : Hotrodders Bulletin Board
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Old 03-04-2006, 11:51 AM
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MP170(Epoxy Primer) P-Sheet Info.

Guys. I'm reviewing my P-Sheet for my MP170 PPG product and it says " HVLP - 8-10 PSI at the air cap". Man 8-10 PSI at the cap is really not much pressure. I know this is the P-Sheet but what kind of PSI for epoxy primer with a MP-175 Primer Catalyst are U guys using to shoot primer?

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Old 03-04-2006, 12:22 PM
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Thats at the cap, no way to really measure that without special equiptment. An hvlp reduces the pressure internally, but you still would need higher pressure going into the gun. I would start at somewhere around 40 p.s.i at the regulator on the gun and play around with gun settings till you get it spraying the best. The omni brand epoxy isn't real thick so you wont need a large needle. Probably try to use a pressure so it sprays nice, but not overly high that you waste a lot in overspray. Look on the gun, some say what the max pressure allowed is.
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Old 03-05-2006, 08:22 AM
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One other thing to consider on this product...do not use it over "DX" etching primers. It will peel off like contact paper. I don't recall if it's on the sheet or not, either sheet for that matter, DX or 170.
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Old 03-05-2006, 11:10 AM
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BUT, MP170 does like to be appplied over metal that has been treated with DX metal treatments.

As to pressure, follow the inlet pressure recommendations from the mfr. of the spray gun.
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