Thanks Zelko. We use Crown mostly nowadays also, along with some Amagic.
To me, an equally important question is what are you using for adhesive? We can make foil "kinda stick" to lots of different inks and adhesives. But to get good coverage and then to get it to ride out 25+ washes, especially silver...makes the adhesive really important.
The best adhesives we've tried are waterbased but they are a nuisance to keep happy on screen, specially in a design which uses a lot of non-foiled elements mixed in. It just seems like its an awful lot of plates to keep spinning at the same time. But with Silver foil (our worst foil to get 100% reliable coverage and good washfastness) we seem to always go back to waterbased adhesives.
I'd like to hear what more seasoned experts use for their foils and adhesives, because we think it's a pretty fiddly process... and we do a fair amount of it.