POR 15 or Chassis Saver Paint in Ontario

[Jacques Reed]

Originally Posted by rob love

Personally, there are only two kinds of etching that I like: flash rust or else sandblasting. If you apply POR-15 on a smooth surface, odds are it will peel off like a film sheet.

Hi Rob,

I just obtained some Grey POR 15 to paint the insides of my 16" wheel to aid mounting and removal of the tyres as suggested in this forum.

I am new to this product and would welcome some info from forum members who have used POR 15.

I had already painted 5 of them with etch primer and have read the pamphlet that comes with the paint so I don't really want to remove it if I don't have to. The pamphlet does not specifically say it wont stick to other paints so has anyone else painted over etch primer, or any other paint, with POR 15 and found any problems? I did try a small test swatch on the etch primer and even a ball peen hammer would not shift it! That doesn't mean it could not fail to adhere with time however. You can see the shiny grey bit on the upper right side of the wheel.

The comments on peeling off smooth metal are interesting. I went back over the rim with flap disks to smooth out a bit more of the pitting before the POR 15 goes on. (The rims were originally soaked in molasses and water to remove all the rust) I finished it with a 120 grit disk so it is fairly smooth in places. Would there be enough small scratches in the steel from the flap disk to make a good key for the POR 15 or should I go the flash rust method? That's easy enough to do if I brush it with metal prep, wash it off, and leave it overnight.
One of the 5 wheels is virtually a new wheel, smooth, and free of rust so will need "roughening up" on that basis for the POR 15 to adhere.

All ideas on the subject gratefully received.

Cheers,