Chevy Nova Forum banner
1 - 15 of 15 Posts

·
Premium Member
1963 Nova SS Convertible
Joined
·
147 Posts
Discussion Starter · #1 ·
I have used POR 15 in the past but only for interior floor boards. Guys who have experience with this could you please share your opinion about it. And where do you think it works well and not. I have considered underneath my car, floor boards, under dash and inside wheel wells ....Your input is appreciated.....thank you.

Dave Nichols
 

·
Registered
63 SS convertible 67 SS 4 spd
Joined
·
1,054 Posts
any surface, especially in tight area, most be completely clean or rust can develop under POR 15
I'm not sure I agree. What do you mean by "completely clean"? POR stands for Paint Over Rust. I did the entire bottom of my 63 and under the dash as well. Did it years ago and it still looks good.
 

·
Registered
Joined
·
440 Posts
I know a lot of people say it doesn't work, here's my results. On another car I stripped the frame by hand using wire wheels etc. It was not super rusty. I used the por 15 exactly as they recommended. I'm very happy with the results and it is extremely durable. Put it this way, if you get a drip on your unprepped fingernail it doesn't come off!!!!
 

·
Registered
Joined
·
7,316 Posts
I've had very good luck with it, but I did all of the steps - clean everything down, marine clean, etching stuff, Por 15 then spray bomb top coat. Multiple restored cars and I can't think of a time that rust came back when properly prepped.
 

·
Registered
66 Chevy II, 67 Chevy II, 65 C10
Joined
·
1,038 Posts
POR 15 does not like clean metal. It is made to be painted over rust. If your metal is clean just prime it and shoot some good ole rustoleum on it. DO NOT get the POR15 on your skin
 
  • Like
Reactions: mrlaze

·
Registered
Joined
·
160 Posts
My understanding of the POR product is that it requires rust as part of the activation and chemical bonding process. If I had a rust free surface (more desirable starting point in my eyes) then I would go another route. Solid rust is still rust underneath.
 

·
Registered
Joined
·
1,100 Posts
I used POR 15 on the underside of my dash. There were places where there were some surface rust and I brushed it on. Haven't been back under there but I would have been dead and gone of old age before it would have caused any damage even without the POR 15 much less with it.
 

·
Registered
Joined
·
1,229 Posts
honestly, if your car is garage-kept in reasonable humidity, as most are once finished, and kept out of the rain, you could leave interior bits bare metal and it should outlast anyone on this message board.

-Rusty
 

·
Registered
Joined
·
8 Posts
Gentlemen,

I had a 66 Chevy II and wish I still had it, but hope what I am posting helps resolve the issues with POR 15. Twenty years ago I build, by hand no less a 40 ton bridge consisting of 11 I-beams, 28 pieces of inner and outer truck frame rails decked over with green oak planks. I used POR 15 on the I-Beams, however before applying the POR 15 the beams were sprayed with phosphoric acid, you can buy this in powder from commonly called concrete etch or even use Coco-Cola and let it dry overnight. The acidic material will turn rust into ZInc and then apply the POR 15. In fact after welding steel do the same thing before painting to eliminate the pin-point bits of running rust that "MAGICLY appears about 6 months later on a welding piece. But getting back to the bridge, I am now redecking the ramps [truck steel supports the driveway and road side pieces] along with installing new wood on the road deck. All the steel pieces are fine, save for where the wood rubbed the POR 15 off the top of the I-Beams. Now for the cars here is another suggestion. Go on line to a marine store that sells boating accessories, seek out Zinc anode plates. They come in all sizes and prices from as low as $15.00 with a stainless steel bolt and nut inserted in the plate. The zinc will help reduce rust from forming on A arms, etc..... As a footnote I worked [even though I dont have an engineering degree] as a Vehicle Design Specialist with the Port Authority of NY & NJ from the mid 80's until 2007 and with NJTransit for 2 years in the 90's then was invited back once more with the Port Authority and more than a few of the vehicles I designed remained in service for over 25 years with no frame or weldment failures
 

·
Registered
Joined
·
8 Posts
Forgot to mention that in 2014 I purchased a 1996 GMC Step-side pickup,and the previous owner had the frame and underside of the truck coated with Herculon bed liner and there wasnt a singe spot of rust i sight!
 

·
Premium Member
1963 Nova SS Convertible
Joined
·
147 Posts
Discussion Starter · #15 ·
I've had very good luck with it, but I did all of the steps - clean everything down, marine clean, etching stuff, Por 15 then spray bomb top coat. Multiple restored cars and I can't think of a time that rust came back when properly prepped.
What is marine clean? I am sand blasting, I though then just cleaner solvent and apply. ?
 
1 - 15 of 15 Posts
Top