: I mixed Durham's putty with saw dust at 2/1 ratio and the fills are quite
: white. Is this going to disappear at the wet out like i've heard?

I have the same problem, last time i used it, it darkened enough to work out fine...within a day.
Might be i used larger amounts to fill larger cracks and seal coat epoxy did'nt absorb into it enough to change any color.

I bought some acrilyic paint to try and match the color..will have to gouge out some old putty some first.

the water color idea sounds good...lightly sand off the seal coat, then see if water color will absorb into the putty, then reseal.

Looking at the putty i seal coated...it does'nt look like the epoxy absorbed into it more than skin deep.