On Tue, 23 May 2006 06:03:09 GMT, in message

Jere Lull wrote:

In article ,
"Roger Long" wrote:

How far can you stretch bottom paint coverage by thinning?


Why?

(yes, I read the other posts) Bottom paint effectiveness depends upon
film thickness.

I'm not sure that's generally true.

With ablative paints the duration of protection depends on film
thickness, as they disappear in time.

With hard paints all the action is supposed to be at the surface, so
there isn't much plus to extra coats unless you are going to wear them
off. (Yes, I wore off VC17 from the bottom foot of the keel in
shallow, sandy, weedy places last season, but that was physical
antifouling, right? Yes, Lake Erie is Shallow)

Ryk