Dave wrote:
On 16 Jan 2005 09:58:14 -0800, "Joe" said:

Throw that zinc chromate away and get some endsrust, redlead, epoxy,
bottom paint. I can go 3- 4 years min. on a bottom job without
seeing
any rust.

I'm all ears. Can you describe what you do in a bit more detail? I
use zinc
chromate followed by bottom paint because that's what my surveyor
recommended, but would certainly love to find a more effective
treatment.

Whats important is having a surface clean of rust, the best is to
sandblast. Second wirewheels and lots of elbow grease. But even after
doing both you will have some microscopic rust. Coat the steel with
endsrust, that what the local shops re-selling in call it here is a
link: http://www.interstateproducts.com/rustkiller.htm

Its a great product, waterbased and it will nuteralize any rust, turns
it black, the stuff is like a polyurthane but no bad fumes and is 100
times better than Naveljelly or ospho. A good thick coat of redlead
next is ideal if you can find it, I have a navy buddy get mine.

Next get a quality 2 part epoxy to provide a waterproof barrier, Then
your antifoulant. Zinc chromate will react with many antifoulants
surely it goes to **** in no time with copper based antifoulants. Makes
the hull hot electrolysis wise.

On steel I prefer to use a insecticide type antifoulant with no metals
at all.

Do all this when the humidity is below 20% and give each coat a day to
dry. I usually put 3 coats of epoxy, Rustolum make a garage paint floor
epoxy that is as good as any, and cheaper.

Good Luck

Joe