POR 15 peeling off subframe! Better alternatives????
Turbo Mini Forums

I went halves with another member on this forum for a big tin of POR 15 paint thinking it was going to be the mutts nuts! Truth is, on both of our subframes, it has started to peel off...it comes off in a very thin film. I thought the whole idea of this expensive stuff was that it really ate into the metal meaning if you chipped the paint off, the surrounding areas were still completely protected...this can't be the case if it peels off like a film :/

I don't understand what I did wrong, I followed the instructions.

Anyway, has anyone else had this trouble?

And as for alternatives, what options are there?

Cheers

Mike

Not an answer to your question but ive just painted mine in the stuff too. I used the sterling silver and at the mo still looks pretty good but it has just been sat in my garage.

I had both subbies sand blasted and then painted in whatever primer they used. I then painted over the primer with the por 15. Maybe I need to rethink this then?

Is your car in use on the road subject to the weather?

front subframe? oil residue?

I would use epoxy mastic, I swear by it. If you get a big tin of the jotun stuff then it's not too expensive. I have only used the rustbuster one but its a bit pricy

rear subframe, and no oil residue. wire brushed and wiped in spirits before it was applied.

I'm thinking of re-applying it with some etch primer first this time ...I don't know if this will help it eat into the metal a bit more or hinder it! No mate, has been in a dry workshop since being painted.

I know it says it should be applied direct to rusty surfaces....but what if you're using it as a preventative measure and therefore don't have any rust to apply it to? ...surely your subframe doesn't have to be rusty for it to work.?

wiped with what? white spirit?

I know white spirrit is a bit oily, I would expect the instructions to say use somthing from the POR range, or somthing like thinners or panel wipes.

If you are doing it properly you use three of their products - marine clean, primer and then por15.

I painted the underneath of my mini with it straight onto metal/rust. it pealed.

Thing is though, it gets bloody expensive using all Por products....and as you know, every single company "recommends" their own products to use alongside one you've already bought. There has to be alternatives to prep the metal correctly without buying their overpriced prep kit.

Edited by Mowen123 on 8th Feb, 2014.

gets more expensive if you use only one cause they peel off!

Ive used theire tank sealing stuff and its really good, the claning stuff really gets things back to bare metal, inside of my tanks looked like they'd been sodablasted.

remove subframe, strip it and have it powdercoated.

Job done.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Its the preparation on the metal. Lots of people degrease but dont do it properly. You need to wipe it on and wipe it off again without letting it evaporate. If it does evaporate it just leaves the grease on the part again. All surfaces need a good key for the paint to stick to aswell.
Personally I dont know the POR 15 but itll be the same process as any other paint

I seriously doubt it!

mine are powdercoated and still look great 10+ years on

That said i bought some Flag black smothrite type paint from toolstation recently for the bench i boult in the garage, when it went on it looked like shit but after leaving overnight to cure its come out like glass

only experience ive had with paint is on the body of cars and i totally agree preparation is everything !
you only need to have paint reactions once to know is really sucks having to re sand the car..

also had grate results with the 2 part epoxy primers stuff sticks dam well if prepared properly..