John,
I do not know what the Scherell's is composed of. I have considered calling the finisher who was using it to see if I may have been applying it wrong but have not as of yet. It comes with no directions.

I use alkenet powder, first in straight BLO for a base back ground color, then add it to the Daly's in the same form. I'm sure it gets darker over time but to be honest, if you mix one day, the next day it is ready to use. The Daly's sealer can be used the same way and it has more solids and fills the pores faster. Duane Wiebe had a nice write up on his web page about the products and process but it appears to no longer be visible. The Daly's is really good stuff.

Steve

http://www.bertramandco.com/
Booking African hunts, firearms import services

Here for the meltdowns