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3349 Views 6 Replies 6 Participants Last post by  Crazy68Dart
Is the por15 stuff good for brushing on the underside of my car and on the floor and trunk pans inside the car, And how should I prep the metal before brushing it on.And also does it stop rust from spreading? Thanks.
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ya you can brush it on.  I would sandblast but if you do not have than a wire wheel on a side grinder then sand untill your satisfied. but to me it sounds as though you have some surface rust i would sandblast it off even if you have to rent a sandblaster for a weekend.
I just have a bit of surface rust in the common spots ( frame rails, trunk and floor pans) places like that, I was reading on there website and it says that it stops rust and even fills pin holes, just wondering if it is true ? thanks
Like azz7772 said I would try and remove the surface rust i.e. 4 1/2" wire wheel on an angle grinder. You would have to be able to get to both sides of the surface to seal it from spreading. I brushed it on the RR and you can't tell it was brushed. Forms a very hard plastic like coating. I plan on doing the same with the Dart. Also the sealer is not UV friendly.

Just like paint prep is key.
I suggest you use their MetalReady for prepping surface. Its basically phosphoric acid and zinc. After a couple minutes, the acid etches the metal and the zinc bonds to the metal. Just rince off to neutralize. Worked great on my floor pan

I used Ospho to treat any marginal spots and a 4.5" cup wheel. Brushed on the Por15 and then top coated with Rustoleum Semi-flat black. Looks nice.

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