I don't think many would recommend it. To use the foil, I do a "pouch/cap" system. By this I mean:
-Make a pouch like you normally would to totally enclose a blade, but a little longer
-Cut the pouch near where the tang would be, about a 1/4 of the tang sticking out of the end
-With the excess foil you cut off, slip that over the tang to where it slides over the end of the tang and also goes over the main foil a little ways
-Wrap a strip of paper around the tang before putting the "cap" on
-When you are ready to quench, grab the "cap" and tang of the knife with your pliers/tongs, pull the knife out of the "pouch" (you will have to grab the foil pouch at the very tip with another pair of pliers, and then quench the blade (the "cap" will still be on the tang).
This is the method I have been using lately. It might or might not adapt to your HT procedure. Good luck.