I use them and have for a while. 1:1 almost to get anything to float well. Don't mix them into raw plastisol, only cooked stuff.
It will make your baits extremely tough as you probably have noticed and you loose most, if not all, of the action in the bait.
I have seen where they use a small cork on the line in front of a bait before and the cork is cut out to spit or cause a bubbleing like a Chug Bug. Highly effective technique with a Wutz-It or carrot behind it....
Don't tell anyone I gave this out!!!!!
Jim