best for bare metal?

I only use Hydrate 80 from www.bilthamber.com on bare metal, by far the best thing i've found.

I did a test about 4 years back on a sheet of normal 1mm thick steel that had been sat in a damp corner and gone rusty all over. I ground clean a strip 1" high across it, then used a wire brush on an angle grinder to clean a 1" strip above that. Then i tried 4 different things in vertical lines (so over all 3 bits ground clean/ wire brushed and rusty)
I used Hydrate 80, Kurust, loctites rust killer and Bilt hambers zinc primer. Then left it in the back garden through 2 yorkshire winters.
The Kurust didn't last 2 months, loctite did a little better about 3 or 4 months. But neither are visable at all now its just rust.
The zinc primer after 4 years is getting rust eating in from the edges of the painted area, the Hydrate 80 still looks mint.

So thats all i use now. 3 or 4 coats of that followed by either their zinc primer (if i want the extra protection) or just Rustoleum with a couple of layers of stonechip under the car.


Most stuff like red-oxide primer and similar have been watered down by the health and safety idiots so they don't work as well as they used to.