Preventing Rust between Blasting and Paint

[Leaping Deer]

At some point soon I am going to have the tub and panels blasted but they might not get done all the same time, possible over a couple of weeks. I do have a garage to keep them covered but I am concerned about moisture in the air. I could prime the panels but I have heard that this won't prevent rust. Does anyone have suggestions?

 

[dbarrett]

Prime and seal. You can buy sealer as part of most paint systems. Sealer will keep them from rusting till you have time to paint. Sealer will also fill in minor surface imperfection like sanding marks.

 

[Leaping Deer]

So what exactly is the sealer and how do I prep it when I am ready to paint?

 

[AnthroCruiser]

What about using something like POR-15 or RustBullet? Seems like the perfect time to do it, if you're going down to bare metal.

- Matt

 

[toddslater]

If you prime them shortly after blasting with a zinc chromate epoxy primer you will be fine until final paint time comes. If your blasting is not the greatest or there is a long time between blasting and priming, then I would consider applying a vinyl butyral wash primer, then priming with the zinc chromate epoxy primer.

 

[cruiser88]

If you prime them shortly after blasting with a zinc chromate epoxy primer you will be fine until final paint time comes. If your blasting is not the greatest or there is a long time between blasting and priming, then I would consider applying a vinyl butyral wash primer, then priming with the zinc chromate epoxy primer.

this is what you want to do. ppg has it alone with carboline a little bit goes a LONG WAY with zinc

 

[nmbuckaroo]

last friday i sandblasted the wheels on my small tractor. i did not have the primer or paint so went to town and got supplies. tow is 15 miles. gone about 3 hours. got back and dog had pissed on both left wheels and they were already rusted. had to re blast.

 

[merbesfield]

last friday i sandblasted the wheels on my small tractor. i did not have the primer or paint so went to town and got supplies. tow is 15 miles. gone about 3 hours. got back and dog had pissed on both left wheels and they were already rusted. had to re blast.

that is funny.

 

[cruiser88]

last friday i sandblasted the wheels on my small tractor. i did not have the primer or paint so went to town and got supplies. tow is 15 miles. gone about 3 hours. got back and dog had pissed on both left wheels and they were already rusted. had to re blast.

sorry

 

[Wile E Coyote]

Just posted in similar thread, but here ya go: http://www.zerorust.com/prepstep.html
The Zerorust and Prepstep products are great stuff, and 1/2 the price of POR-15 and Rustbullet, etc.

 

[saint60]

i'da a fawking rubbed his nose in it.

 

[Leaping Deer]

Thanks for the input guys. I will try to keep the time from blasting to paint to a minimum. I just didn't want it to rust over a couple of weeks.

 

[webelk6]

whatever you use, and the above mentioned are all good products. Make sure you check the inter coat adhesion time. Some paint have for instance a 48hr. window. Otherwise you will be abrating it all over again

 

[brownbear]

If you do your first coats with por-15 then it doesn't matter if a little surface rust appears prior to painting.

That is what I did with my doors/body. Sandblasted, cleaned with prep products for POR then painted por. and then the por primers and topcoat.

 

[83bj60]

last friday i sandblasted the wheels on my small tractor. i did not have the primer or paint so went to town and got supplies. tow is 15 miles. gone about 3 hours. got back and dog had pissed on both left wheels and they were already rusted. had to re blast.

I found out many years ago that sanded metal can rust in as little as twenty minutes just in the air here in the moist east.

When I sandblasted my rear wheel wells on the Old faithful ( a repair that has lasted to this day), I spayed on zinc rich primer immediately after sandblasting. Immediately as in 'drop the sandblasting gun, shake the previously warmed-up can and spray'. Of course a big part of the success of this procedure was my ply rubber/fiberglass/resin process to rebuild my wheelwells