We had silver foil on poly/cotton neon baby rib tanks, like a 1000 of them. With a wb print as well.
It came out to something really weird, like 1 second press, 4 second wait, peel while still warm.
The odd thing about silver is if you press too hard or hot or long the adhesive bonds to the foil backing
and when you go to peel it rips the adhesive off the shirt usually.