I have been using the Daly's for Dense Woods (Cocobolo, Lignum, Ebony etc: )
I have been using Polyurethane for all the rest.. I keep them in seperate Pickle Jars and just move the top around
so far no issues with the finish going bad
I have a few Brush customers that have been updating me on their treated wood brushes along with my personal ones, and so far so good the finish is holding very well, I am pretty happy with the results overall..
The only downside is you better like Pickles
I even found they same Jar with Jalapeno's hehehe we are well stocked on both
ps: There is a solution out there called "Cactus Juice" that gets very high reviews, but dang they are very proud of it