Kimjon Posted November 15, 2018 Share Posted November 15, 2018 I'm prepared to be shown the errors of my way, but here is some photo's I thought may entertain you all. Why por15? Well online it's touted as the best thing to use on the likes of chassis, fuel tanks, engine mounts...all those places that rust really easily under the car. It's said to love rust, basically stick to it and protect it from deteriorating further etc. Apparently you don't need to put a lot of effort into prep work which is another big plus. This bike fork is looking mint, about a year on from clear coating in por15. This was sanded back with a flap disc to bear metal...then painted in por15. Looks mint, but so it should. I'd expect the same result from any normal paint too. It's kept under a cover, so no uv light can get at it, as I was told por15 doesn't like sunlight. I didn't really expect this to last in all honesty and always had my doubts about doing it like this with no etch primer...But thought these results may deter anyone who's thinking of brushing this on their chassis (in the same product, but probably with black tint in it) and calling it job done. 1 Quote Link to comment Share on other sites More sharing options...
Kimjon Posted November 15, 2018 Author Share Posted November 15, 2018 Next up is some metal that was prepped much the same way, but obviously no as well. You can see the rust growing underneath the clear. It's like a spider web....and each month I see it spreading further. Quote Link to comment Share on other sites More sharing options...
Kimjon Posted November 15, 2018 Author Share Posted November 15, 2018 Finally; this part was covered in flakey paint and old rust. I hit it with a flap disc until it all looked shiny...But it wasn't the best of jobs I'll admit. However according to por15 it would just about stick to anything and prevent further rusting...so this was overkill preparation. Interestingly enough, if it was black colour...I'd think it was doing it's job. The por15 looks perfect from the outside, no cracks, no chips, no hazing...nothing at all to show it's defective on the outside. It's only because I used clear, that I can see the rust growing underneath. If it was black...I would be totally unaware of any issues. 1 3 Quote Link to comment Share on other sites More sharing options...
Mark_Fleming Posted November 15, 2018 Share Posted November 15, 2018 Had a friend who rechromed his bumpers and had the POR treatment added over them for extra protection.....he had the same result as yours.... 1 Quote Link to comment Share on other sites More sharing options...
Spencer Posted November 15, 2018 Share Posted November 15, 2018 Yeah it’s pretty garbage, did you use their acid wash first? It’s what they recommend and it helps. They use the POR15 tech (water cured urethane) in industry so it does work, but they have a prep process similar with the acid wash first I’m pretty sure. You cannot slap it on bare/rusty steel like people do, it fails all the time. I used it on some big surface areas in the past and ground it al off later as it is garbage compared to actual car paint products. 2 part epoxy primer is basically the only thing you should use on bare steel if it’s something you care about. 5 1 Quote Link to comment Share on other sites More sharing options...
Bling Posted November 20, 2018 Share Posted November 20, 2018 Metal ready goes on before the paint, I assume this was done though? Quote Link to comment Share on other sites More sharing options...
kicker Posted November 21, 2018 Share Posted November 21, 2018 Last time I used it it was Marine Clean -> Metal Ready -> POR15 3 Quote Link to comment Share on other sites More sharing options...
moparmuppet Posted November 27, 2018 Share Posted November 27, 2018 I understood it loved sticking to rust, smash off the loose stuff and go for it. I think you are overprepping by hitting with a flap disc. My 2c. Quote Link to comment Share on other sites More sharing options...
Kimjon Posted November 27, 2018 Author Share Posted November 27, 2018 1 hour ago, moparmuppet said: I understood it loved sticking to rust, smash off the loose stuff and go for it. I think you are overprepping by hitting with a flap disc. My 2c. I thought that too...But where the rust had little to no prep done, it's rusted the worst by far. I wasn't expecting it to work to be honest...But thought I'd share the photos. It's only visible due to it been clear, otherwise you'd think it was perfectly fine as the surface still looks fine. Quote Link to comment Share on other sites More sharing options...
sleeektoy Posted November 27, 2018 Share Posted November 27, 2018 Same result here. Prepped a surface rusted inner splash guard both sides as per their instructions. POR15 coats with the under and top coat and fitted it to the car. 2 years later i pulled the splash guard as orange streaks were running out of it. Completely rooted flaking rust underneath and the POR15 was all that was holding it together - peeled it off to find swiss cheese steel under it all. 1 Quote Link to comment Share on other sites More sharing options...
Get it done Posted November 27, 2018 Share Posted November 27, 2018 Could this be caused by the metal still holding moisture? Warming the metal before applying it , in a bake oven or something similar to dry it out thoroughly would help surely? Quote Link to comment Share on other sites More sharing options...
Yowzer Posted November 27, 2018 Share Posted November 27, 2018 The POR15 is moisture cured, so it's "supposed" to pull all the moisture out of the metal / rust as it sets. 1 1 Quote Link to comment Share on other sites More sharing options...
Bling Posted November 27, 2018 Share Posted November 27, 2018 Is it rusting from the inside? As in moisture inside the frame is feeding the rust? I just really can't see moisture getting through the paint to the frame. Quote Link to comment Share on other sites More sharing options...
Kimjon Posted November 28, 2018 Author Share Posted November 28, 2018 Not sure why it's rusting under the paint. But I wouldn't use the product for anything valuable. Will stick to etch primer and 2K from now on. Quote Link to comment Share on other sites More sharing options...
Bling Posted November 28, 2018 Share Posted November 28, 2018 Send photos to POR15, see what they say. Quote Link to comment Share on other sites More sharing options...
ajg193 Posted November 28, 2018 Share Posted November 28, 2018 TBH it's better than no paint. Quote Link to comment Share on other sites More sharing options...
Roman Posted November 28, 2018 Share Posted November 28, 2018 Yes but so is any other paint that doesnt stop rust either. 2 Quote Link to comment Share on other sites More sharing options...
sheepers Posted November 28, 2018 Share Posted November 28, 2018 13 hours ago, Bling said: Send photos to POR15, see what they say. The response you'll get is, "You didn't prepare the surface properly it's all your fault our product is perfect in every way despite the massive evidence to the contrary its your fault you stupid customer" 4 Quote Link to comment Share on other sites More sharing options...
yetchh Posted November 28, 2018 Share Posted November 28, 2018 In my experience, sand blasting works the best for surface prep.. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted November 28, 2018 Share Posted November 28, 2018 Yeah but you gotta get it coated right away. Kephos 253 within 30 mins. Quote Link to comment Share on other sites More sharing options...
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