The approach makes for the best ink job
I have found that most of the brands work ok.
Polys by their nature will shed the ink quickly.
Lube the threads on the top when you open a new bottle, light smear of chap stick will help with the sticking some encounter.
Check that the top is seated every time you open it & store your ink in a small zip lock bag. In a gallon size zip lock I insert the stencil inside of a file folder. When it is time to refresh your stencil @ the tourney, the file folder gives you a backing for any stray drips.
GAMMA 4000 + WISE | PRINCE SPEEDPORT GOLD