On Apr 7, 8:01*pm, Doc wrote:
The guy at Home Depot said that if I use Liquid Nails to adhere my
window sills - which he said are some kind of composite marble, not
true marble - directly to the exposed wood frame of the window, over
time it will bleed through and become visible in the shape that it's
applied. His assertion was that I should nail lathe to the frame and
use thinset for the sills.

Thoughts?

Sounds like a fantasy story IMO. Liquid Nails won't bleed through a
1/8" piece of fiberboard. so how could it show up in a cured resin
matrix of faux marble? By the way. why would you want to nail a
machine tool to your window sill (the lathe)? Most people would use a
wood strip called a lath. G

Joe