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jpeters
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Joined: May 06, 2005
Posts: 762
Location: Woodsfield, Ohio
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 Posted: Wed Feb 22, 2012 9:16 am Post subject: Another POR-15 Question (POR over OG paint) |
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I know...here we go again. But I did look and didn't find much valuable information on this question.
I recently stripped the undercoating off of the belly pans and inner wheel wells from my 68 Westy project. WHen the undercoating came off, there are sections of nice OG paint, but there is also a decent amount of surface rust in other areas. I want to paint them with POR since rust prevention is my primary concern. I've noticed some people say just use 60 grit to scuff in a cross hatch pattern and then go ahead and paint. I'll use the cleaner and metal prep also. Any other ideas?
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'73 Westy (dual stock carbs, SVDA w/ compufire)
'68 Westy http://www.thesamba.com/vw/forum/viewtopic.php?t=484180
'65 Westy SO-42 http://www.thesamba.com/vw/forum/viewtopic.php?t=435614
*PM me if you have SO42 rear facing jump seat or icebox
'65 Bug
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Dontburnit
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Joined: May 13, 2011
Posts: 229
Location: Manitoba
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| Posted: Wed Feb 22, 2012 2:17 pm Post subject: POR 15 |
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Primer is your friend. Use it too.
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Make sure you disconnect the battery charger before starting to weld. |
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jpeters
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Location: Woodsfield, Ohio
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Dontburnit
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Joined: May 13, 2011
Posts: 229
Location: Manitoba
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| Posted: Thu Feb 23, 2012 10:42 am Post subject: prime or not |
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I chose to use the etch primer compatible with POR 15.
It turned out pretty good. Hard to spray, need lotsa air. Even harder to clean up after. Throw your gun away when you're done.
POR 15 over etch is much harder than without the etch. Sticks better, seals better. Should last longer.
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aircooled356
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Joined: October 27, 2006
Posts: 420
Location: Yosemite, CA
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| Posted: Thu Feb 23, 2012 10:28 pm Post subject: |
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Por-15 is a great barrier between the metal and the atmosphere. It's tough as nails and will protect what is left of the metal....
However, it is very tempermental when it comes to bonding with other paints/primers/sealers.
It sticks well with a scuff with 80 grit to give it something to bite.
It dries to a gloss finish which will need to be sanded if topcoated.....it does not like to be sanded. It will ball up if overheated while sanding.
For the best results, you will need to use topcoats compatible with their system.
If used in an area that can be undercoated, or in a trunk, it's a wonderful product.
Just speaking from experience.  |
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jpeters
Samba Member
Joined: May 06, 2005
Posts: 762
Location: Woodsfield, Ohio
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| Posted: Fri Feb 24, 2012 2:05 pm Post subject: |
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I've used POR before, so I knew what to expect. The stuff is tough as nails and I've had nothing but good experiences with it, except when I get it on my skin.  I just hadn't used it directly over a painted surface. Always before it was on some surface rust or other rougher areas.
I ended up scuffing the wheel wells and belly pans with 80 grit and then hitting that with a light coat of etching primer before putting on the POR. Seems to have gone on pretty well, but only time will tell how it adheres.
_________________
'73 Westy (dual stock carbs, SVDA w/ compufire)
'68 Westy http://www.thesamba.com/vw/forum/viewtopic.php?t=484180
'65 Westy SO-42 http://www.thesamba.com/vw/forum/viewtopic.php?t=435614
*PM me if you have SO42 rear facing jump seat or icebox
'65 Bug
neverdnf on Instagram |
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tspot100
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Joined: March 26, 2006
Posts: 388
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| Posted: Sat Feb 25, 2012 10:05 am Post subject: |
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| por-15 will peel if applied over paint. even if scuffed. it's just a matter of time. i have been using por for over 12 yrs. |
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jpeters
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Location: Woodsfield, Ohio
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