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Old 06-04-2007, 05:10 AM
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Vinyl Wash Primer

I currently have a sandblasted cab, bedside and wheel tubs. All of these pieces need metal and filler work. Should I try and complete all metal and filler work then prime with vinyl wash primer and DPLF90 or do the priming first so that flash rust doesn't have a chance to start. I have some concerns of doing body work over wash primer although the tech sheet mentions that when spraying the wash primer that it can overlap onto the filler. How much durability would I give up if I skip the wash and go ahead and prime with the DPLF90 and then do all metal and filler work?
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Old 06-04-2007, 05:18 AM
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Skip the wash primer, PPG's wash primers shouldn't be applied on a sandblasted surface-check out the tech sheet. Epoxy will adhere just fine without the wash primer.
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Old 06-04-2007, 06:43 AM
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Filler will not stick to wash primer!! Also, wash primer is not waterproof. Epoxy the cab, then do your bodywork.Dan
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Old 06-04-2007, 07:01 AM
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Thanks for the replies. I just wasn't sure how much protection I would give up by not using the wash primer. Thanks!
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Old 06-04-2007, 08:02 AM
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wash primer!

the only time i applyed wash primer was when i was doing production painting at a bus company,we cleaned the surface blew it off masked re-checked all areas then re-blew the surface and then when the temp was right in the booth we gave one coat of wash primer before we primed!! in most cases there were not any places of body work and if so very little.i think the other guys in this blog are right and go with what they say,i agree!!!!(bourne51).
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Old 06-04-2007, 08:13 AM
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Of course there is a difference between "Vinyl wash" primer and "wash primer". Vinyl wash as, well...vinyl in it. It is water proof and is a DAMN good etch primer. I don't think PPG has one, though DX1791 is close.

I have a test panel out in the back yard that has S-W "Yinyl wash" primer on it over bare metal, it doesn't have a hint of rust coming thru it after 7 months in the weather.

It is however, not the best thing for this project. First because it is sandblasted, second because it needs filler work. Get it protected in epoxy primer as the others have said and then do your body work at your leisure.

Brian
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Old 06-04-2007, 08:27 AM
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From my experience, skip the DPLF, it isn't worth a flip and will not hold up long term. Purchase some Southern Polyurethane self etching epoxy primer. The stuff is dirt cheap compared to PPG and holds up much better.

Vince
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Old 06-04-2007, 09:58 AM
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The wash primer I was referring to is PPG DX1791/1792. I will skip it, since this seems to be the consensus. PPG does recommend it for their lifetime warranty which I could probably never collect on. Could some one explain the sandblasting vs sanding issue? I already purchased the DPLF90 epoxy primer so I will be using that. I thought it was a top notch primer?
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Old 06-04-2007, 10:14 AM
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Quote:
Originally Posted by 68C10
I thought it was a top notch primer?
Thanks
I sympathize with you, I did the same thing, even painted my frame with it. After a discussion in this forum on how it just wipes off with a lacquer soaked rag, I tried it and it did. That is when I was turned on to Souther Polyurethanes epoxy.

Vince
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Old 06-04-2007, 11:56 AM
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Quote:
Originally Posted by MARTINSR
Of course there is a difference between "Vinyl wash" primer and "wash primer". Vinyl wash as, well...vinyl in it. It is water proof and is a DAMN good etch primer. I don't think PPG has one, though DX1791 is close.

I have a test panel out in the back yard that has S-W "Yinyl wash" primer on it over bare metal, it doesn't have a hint of rust coming thru it after 7 months in the weather.

It is however, not the best thing for this project. First because it is sandblasted, second because it needs filler work. Get it protected in epoxy primer as the others have said and then do your body work at your leisure.

Brian

Thanks for clearing that up. I do recall however spraying a panel a few years back with Dupon't 810r ( which is supposedly a "vinyl wash"primer ). and the panel rusted after being left outside after just a few days. Dan
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Old 06-04-2007, 10:43 PM
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Is this it? I don't see anything about "Vinyl wash" mentioned.

Click here

Brian
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Old 06-05-2007, 05:55 AM
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No! It's a dupont product. It's now a discontinued item. Dan
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Old 06-05-2007, 08:03 AM
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PPG has the DPX171 etch primer. Which according to my reps is a Dupont variprime knock off. I dont remember if variprime has the vinyl in it or not.
But then again its NOT compatible with epoxy primer, so who cares.
Another big vote for the SPI epoxy...Eric
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Old 06-05-2007, 09:26 PM
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Yeah, I totally agree on the SPI epoxy being top of the line, another vote here! After using it, learning it, and knowing it's performance a person doesn't want to use anything else. Definately a different animal.

I like most of PPG's products but the DPLF is a disapointment IMO, doesn't even come close to the durability of the old DP line.
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