Por-15

[au03z71]

I'm going to order some POR-15 to paint my frame/suspension and underbody (SWB). Should 2 quarts be enough?

[100mph]

Just did my swb frame, first coat generously brushed on, 2nd coat sprayed on and it took just about exactly 2 quarts

the stuff goes on great but from my research everyone highly recommended diligent prep work otherwise it doesn't stick so good (and you've just wasted your time/money).

[rambler]

also clean up is a pain, I just used cheap brushes and lots of plastic for spills and threw it all away...

[au03z71]

I've heard that a respirator is needed for applying this stuff. Do I really need one or could I just put up a big fan and keep the place ventilated?

[Bears63]

Going without a respirator is okay if you brush on the Por-15, just be sure to have good ventilation. However, if you spray it on then a respirator is absolutely essential.

[OLDIRON69]

Don't get it on YOU! Takes the grinder to take it off!

[100mph]

Yeah for sure, brushing just needs good ventilation but spraying filled a spray booth with mist pretty fast even with fans on.

And yeah, suit up with some old clothes and from experience, long rubber gloves and watch for paint splatter on your face LOL - the black specs on my face eventually scrubbed off with acetone but I was getting nervous there for a while.

[OLDIRON69]

BTW, did you guys know they sell it in clear now? I saw it yesterday at a Camaro Parts place..

[Beelzeburb]

100mph is right, surface prep is absolutely critical to proper adhesion.
I had the frame on my Suburban sandblasted then we sprayed two coats of POR-15 on. That was four years ago and it is still hanging tough.
I've applied it on three of my vehicles so far, and 80-100 grit sandpaper will give some good grip to the paint. After that I remove the sanding dust with a vacuum and/or wipe it down good. Make sure you get in and scuff up any creases or corners too. Any greasy or oily areas need to be de-greased or else the POR-15 will just peel off later.
Just like the others said, wear a respirator when spraying, and don't get it on your skin if you don't want to wear it for the next two weeks. The shop floor where we sprayed the floor of my 'burb is still lightly coated to this day.

[leddzepp]

Always wear a respirator. If you spray it, you can thin it 20%. A little goes a long long way.

[capev86]

i tried por15 years ago without great results and the sun destroys it.

best way to go:

1) sandblast

2) zinc rich etching primer

3) poly bed liner from Al's Liner

poly will work as a sound deadener and will resistant impacts and not flake off like paint and moisture can't get underneath it like with rubberized undercoatings. etching primer gives best adhesion (tells on the website) and zinc will also help stop rust. its a do it yourself product that reportedly performs better than rhino lining and even line-x. you can tint it to match a paint color and it even comes in clear!

[JameslovesJammie]

I thought Por needed rust to bond to and that if you cleaned up the metal you needed to use their etching primer or something. And sunlight does destroy it because it has no UV protection. Needs to be coated if going to see the light of day.

[Beelzeburb]

The sun just makes it change color. They sell POR-15 with UV protectants mixed in. I've got it on a flatbed trailer that sits in the sun all day and its still a shiny gloss black.
POR doesn't need rust, and they do sell Marine Clean and degreasers to prep the surface, but I haven't had a problem with it yet as long as I've taken the proper steps.

[stope4]

The stuff is great. Just clean the surface real good. It will paint on rust, just clean all the loose rust off. If in sunlight use a POR top coat.