dealing with rust

[Harleymike]

OK, my roof and dash have surface rust. The plan is to remove the rust and get down to metal.
But I'm worried I wont remove every bit of it and rust would come back.
I have looked at some products, but its very confusing because there are so many.
Any suggestions on what to use on the metal before priming with epoxy primer.

Thanks for the help

[Richard2112]

https://www.jamestowndistributors.co...uct.do?pid=557

I use this on everything, dash, roof, frame, leaf springs....

It doesn't take much, just a spray and wipe. Too much will leave a gummy residue. It is mostly phosphoric acid so it can burn on the skin. I don't use gloves and it doesn't cause burns on my hands but if you're spraying in a windy area, you don't want this stuff to blow back in your face. That isn't fun.

I clean the area (sand it) then spray some on and wipe it with a shop towel. Let it sit for a couple hours or overnight is best.

[Captainfab]

Before using any sort of chemicals to remove or neutralize rust, check to be sure that it is compatible with the brand of epoxy primer that you will be using. I prefer sandblasting to using any chemicals.

[nail pounder]

Originally Posted by captainfab

before using any sort of chemicals to remove or neutralize rust, check to be sure that it is compatible with the brand of epoxy primer that you will be using. I prefer sandblasting to using any chemicals.

x2

[Richard2112]

Yeah do a small patch and check it before going full bore with chemicals. Sandblasting is great but leaves dust all over the garage/driveway. Can warp sheet metal.

Heinz cleaning vinegar works surprisingly well also. This trans case was soaked in it for two days. Came out nearly spotless.

[Short 3/4]

Originally Posted by Richard2112

Yeah do a small patch and check it before going full bore with chemicals. Sandblasting is great but leaves dust all over the garage/driveway. Can warp sheet metal.

Heinz cleaning vinegar works surprisingly well also. This trans case was soaked in it for two days. Came out nearly spotless.

I have also used vinegar, it's cheap , nontoxic and easy to find. I'm wondering what 'cleaning' vinegar is though. Does that just mean the cheap stuff in the big jug?
Just want to add that at least in my area near at the coast, I've found that old
cars will rust from the inside out due to the unpainted back sides of all the panels, so pay as much attention to the rust you don't see as the stuff you see. (I've learned this the hard way over the years).
Good luck with your project.

[The Rocknrod]

You can buy ospho at home depot also.

[Richard2112]

Originally Posted by The Rocknrod

You can buy ospho at home depot also.

And ACE Hardware

[Harleymike]

Sand blasting isn't an option. Wish it was.
Im using eastwood's epoxy primer over metal.
I will have to check into compatibility.

I see eastwood makes a rust encapsulater product. I believe it can be applied then topcoat. Might look into this stuff also.http://www.eastwood.com/eastwood-bla...over-rust.html

[The Rocknrod]

I rebuilt a Muncie T-10 when I was in San Diego at the base hobby shop, sand-blasted the case. I dont know where I was going with that . . .

[raggedjim]

Originally Posted by The Rocknrod

I rebuilt a Muncie T-10 when I was in San Diego at the base hobby shop, sand-blasted the case. I dont know where I was going with that . . .

Man, I miss the Hobby shops on base, I used them in San Diego and Little Creek Va.

I've used Ospho on some panels and my frame but haven't top coated them yet.

I'm hoping there won't be any reactions when I finally do top coat.

Rg

[yeah_yeah_na]

https://goo.gl/images/TNReLC

I hope the link works.

I'm not sure if you dont want to use a sandblaster because of the mess, if thats the case, these things are great, I use them in my restoration shop on areas where mess is an issue.

The best product to use under a primer in dupont metal conditioner, its sold here in New zealand so i assume it is in the US as well. Follow the instructions and it works great. Coat over with PPG epoxy urethene primer. it does need a hardner but is good stuff, you can even roll it on. Its one of the only primers you can fill over without causing a reaction.

[Harleymike]

Originally Posted by yeah_yeah_na

https://goo.gl/images/TNReLC

I hope the link works.

I'm not sure if you dont want to use a sandblaster because of the mess, if thats the case, these things are great, I use them in my restoration shop on areas where mess is an issue.

The best product to use under a primer in dupont metal conditioner, its sold here in New zealand so i assume it is in the US as well. Follow the instructions and it works great. Coat over with PPG epoxy urethene primer. it does need a hardner but is good stuff, you can even roll it on. Its one of the only primers you can fill over without causing a reaction.

I have a small spot blaster like that. But can't do such a big area with it.
Ill take it down to bare metal and see how it looks. Im just worried about missing some small bit of rust I can't see and it comes back to haunt me later.

[yeah_yeah_na]

Originally Posted by Harleymike

I have a small spot blaster like that. But can't do such a big area with it.
Ill take it down to bare metal and see how it looks. Im just worried about missing some small bit of rust I can't see and it comes back to haunt me later.

Agree, nothing like doing a redo once its got top coat on it. I'm certainly a fan of removing rust rather than treating it, I only use dupont metal conditioner as a conditioner and last line of defence, not a remedy. Good luck, let me know if you need any tips, over 20 years in the restoration game and a 10yr guarantee on rust, I've learned a heap from my mistakes!!

[Harleymike]

Might use this stuff.
http://www.eastwood.com/ew-after-blast.html

[Richard2112]

Originally Posted by Harleymike

Might use this stuff.
http://www.eastwood.com/ew-after-blast.html

That's a good choice and a good price it seems. It's phosphoric acid (I don't know it's concentration) and will do the same thing Ospho does, but the product you link to is about half the cost of Ospho.

[raggedjim]

I usually pay $23 for a gallon of Ospho at a local hardware store.

Rg

[Richard2112]

Originally Posted by raggedjim

I usually pay $23 for a gallon of Ospho at a local hardware store.

Rg

Maybe I need to shop around some. I've seen it here for 9-12 @ qt.

[dracko]

Any decent epoxy primer will outperform all of the single stage "rust encapsulator" paints like POR-15, KBS, Chassis Saver.....
If youre painting the whole truck with epoxy primer why mess with a single stage? just blast or sand it down, neutralize with some phosphoric acid and epoxy prime it. I believe SPI epoxy has phosphoric acid in it and they say not to use it prior to priming.

[Macdaddy1]

Drako

Since I am very interested in this topic and know very little why exactly does an epoxy primer outperform POR-15.

[dracko]

In this scenario epoxy primer outperforms POR-15 because it has excellent corrosion resistance and is a perfect base for top coats. POR-15 isn’t.

There is no reason the dash and roof can’t be properly prepped for epoxy and get sprayed at the same time as the rest of the truck.

Would you prime your doors and fenders with POR-15?

I don’t want to start a POR-15 debate, but I don’t have much use for the stuff.

[Macdaddy1]

I was going to have the body sandblasted and then epoxy primed. I was going to Por-15 all of the other parts and and then spray them myself.

[dracko]

Yeah that sounds right. Use the single stage rust paint for stuff you aren’t topcoating.I did the same thing but used Chassis Saver instead of POR-15 on inner fenders, crossmember, differential, underside of hood and frame.

[richards72chevy]

I've used rustoleum at work and some stuff around the house and it seems to hold up well.I don't see why it wouldn't work good for automotive use.