Gem rust coating

[v1rot8]

Hey,

Have another project in the works and mostly lurk, but thought I'd tap the knowledge base here.

After media blast, the fab shop uses a product called Gem Rust Killer to prevent flash rust as it is very humid here. They say after body work is complete, it can be epoxy primed and provides a good surface to do so.



Has anyone done this with Gem or similar iron phosphate product?

I ask because a different dustless blaster said he epoxy primes the car after blasting.

Thanks
Brian

[dhutton]

Bad idea imho. If that product is not properly neutralized it will lead to paint failure down the road. Epoxy primer is a better way to go.

Dustless blasting sucks too. That stuff gets everywhere and is tough to remove. And it does not reduce warping. That is a myth...

Don

[v1rot8]

Thanks Don,

That's what I've been thinking as well, but the fab shop swears by it. They'll have the car blasted, but gem coat it. I can't find a painter that does this.

What would you suggest for blasting/stripping my car?

You're right, I've seen a dustless job that warped a hood. I called them because they'll come to my property & epoxy for a reasonable $.

Brian

[dhutton]

I remove paint on exterior panels with 80 grit on a DA and only blast jambs, floors, wheel lips etc where removal with a DA is impossible and the shape prevents warpage.

Some interesting discussion about these metal prep products is here:

http://www.spiuserforum.com/index.ph...r-must-read.2/

Don