The Stovebolt Site Forums The Shop Area Paint and Body Shop Can POR 15 fix my pitted hood?

I've been stalling on sanding off my hood, which has had a couple of ugly growths under the primer it came with. So today I figured I'd better get started on it, and took my wire wheel on a 4" angle grinder, and my dewalt orbital sander out and got to work. Well, time has not been kind and the rust has spread around the hood. http://pic20.picturetrail.com/VOL1373/13685773/24611517/414470660.jpg
http://pic20.picturetrail.com/VOL1373/13685773/24611517/414470659.jpg
I'm not ready to restore the truck yet, but it sure needs a coat of primer before winter hits. If I shoot it on as is, it will look like a cauliflower, so I'm trying to find something that will smooth out the rough spots and kill the rust, too. I'm not the least bit interested in bondo, so that's out.
Seems I've read somewhere that there's a type of POR15 that's also has metal filling qualities, and the term silver comes to mind. Is this true? Could I fill this cover this with a thin coat of POR15 (after etching it)? If so, is it sandable? I need to shoot something on here by this weekend, so I'm hoping this will work. Thanks, Lee

If you can get it nice and clean, and none of the pits goes all the way through, I'd shoot it with epoxy primer. Best would be sandblasted, then primer. You can worry about the pits later. JB Weld is an option over the epoxy, and it's also epoxy.

Nothing short of sandblasting is called for on that hood. Once the rust is completely eliminated, body filler over epoxy primer will smooth it out nicely.

What Carl said. Sandblast it.
POR-15 site lists an epoxy putty - the only thing I can see there that would be a filler. Probably very similar to JB
Weld.
If you're worried about it over the winter, anything but epoxy primer won't give much protection against moisture and rust. Appearance wise, just degrease it and shoot it with some rattle can enamel. You're going to need to remove anything you put on later if you don't sandblast it.

I had a very pitted fender, blasted it and then used spray filler, Reface, sanded it baby-[censored] smooth, worked great. I also used this stuff on a front grille, same result.

If you use any primer besides epoxy, water will go right through it and rust the metal. Traditional primers do not provide a waterproof coating.

Yes what you are referring to is Master Series Silver. It's originally used as a bridge paint. It will fill pin holes, it will seal gas tanks, it is sandable. It will stop rust. https://shop.masterseriesct.com/product.sc?productId=8

Needs a lot of sanding but should come off ,por 15 is hard stuff and would be hard to smooth out after you put it on As a back yard specialist lol ,I would try sanding it out or as suggested sandblast .If you don’t have sandblaster and have a compressor they sell a cheep hand held gun type that I have used for small spots that will work .

I agree with the sandblasting option here but, with that pitting and the hood’s thinness, you’d better be VERY careful. I feel you’re gonna open up a block of Swiss cheese when you blast that hood in that spot. Be careful.

There's no way sanding can get to the bottom of rust pits to clean them out, short of sanding the whole thing to paper thin. At that point you might as well replace the whole hood.

An alternative to sandblasting (agree with Fox on being careful doing that), would be to build a dam out of modeling clay around the affected area and soak it with something like Evaporust to remove the rust, then clean it and paint with epoxy primer, then fill and paint. There's a possibility the Evaporust will disappear thru pits that are deep enough, but it is more gentle than sandblasting.

Once you get it rust free and cleaned, All Metal filler may be an option. Summit Racing distributes it.

Ok, forgot i started this, but I wire wheeled, etched and painted Silver POR15 on all the worst spots, which was about half the roof and a lot of smaller spots on the hood. I had to wait 4 or 5 days before I shot some more flat black rustoleum to get it covered up before the fall rains and winter hit. The por15 filled the pitted areas pretty well, at least good enough for now. Sometime down the road i intend to do a frame up restoration, but now is not the time. The old flat black had faded to gray, and the surface rust couldn't wait any longer. I masked it off and shot it with my cheapo paint gun. Guys kept driving by and saying, "looking good!", which i know full well it looks like an amateur crap job, but i just said it's what i call a "better than it was" paint job, which is true, but that's not saying much. Anyway, it's done (for now), so it's time now for adjusting valves, installing the new headliner, new king pins and front tires because of the kp's, oil change, tune up, and the list goes on. But at least it's back in black. Thanks for all the help and suggestion, everybody! Lee Butcher http://pic20.picturetrail.com/VOL1373/13685773/24611517/414481334.jpg http://pic20.picturetrail.com/VOL1373/13685773/24611517/414481333.jpg

Cool truck, Showme!