Hi there I have a former vinyl top car and the roof is pitted pretty bad I dont want to replace the roof so i was considering using the por 15 silver with the metal filler to fill the pits and the thing is i dont want a considerable amount of thickness over all just fill the pits then one uniform cote over that so i was thinking about how to do this and i came up with using some kind of squeegy or maybe a foam brush to get it in the pits but not on the rest of the flat surface kind of push it around so it just fills the pits. let me know what you guys think

I have had pretty good results filling in pitted metal with Silver POR. There is more solids in silver so it fills pits better. Now I'm not sure you want to use it as a base coat for a paint job.

You could probably get away with it if you want to seal the metal, and use a tie-coat primer from Restomotive Labs before regluing another top on.

I have used a metal etch body filler with good results. But you need to remove the rust or it will come back thru the top coat.

Best bet would be to use POR to seal the roof, then tie-coat primer, and put another vinyl top back on.

I would not be putting a vinyl top back on so I would prob have to use one of restomotives primers before I did the paintjob

I would say not to use por15 as a base coat then if you plan on not putting the top back on. You would be better of probably using an Etch Primer with a several top coats of an Epoxy primer. As long as all the rust is cleaned up pretty well this should work fine.

I agree with SS396boy. I would make damn sure that all of the rust is gone by blasting the area with a spot sandblaster, then you can shoot it with an etching primer and multiple coats of a high build epoxy primer. After you shoot wach coat of primer sand it until you jsut break through the build primer into the etching primer, then shoot another coat. after only a few coats your pits will be gone and the nyou can finish sand and paint the top. But the secret to making this kind of a "fix" as permenant as it can be is to remove absolutley all of the rust tongue.gif

Dumb question, but once you got it down to bare metal, why couldn't you just use a skim coat of filler or lead to fill in the pits, then prepare normally for repainting (just like normal bodywork)?

Crankshaft

my car is made of filler right now so I dont really want to use mor of it and i want to prevent rust forever. I know filler is a viable option just dont want to do it also i have no experience with lead

Originally posted by Crankshaft:
Dumb question, but once you got it down to bare metal, why couldn't you just use a skim coat of filler or lead to fill in the pits, then prepare normally for repainting (just like normal bodywork)?

Crankshaft Applying filler over areas of rust is not really a smart way to prevent corosion. The etch primer 'bites' into the metal and provides an excellent basecoat adhesion layer. Follow that with DP-90 and only then I would use filler to level out the areas.