he's not going to use it everyday.. I dont' think.
Just dip the whole thing in paint, and let dry. The first few chops, will make the paint come off.you can also use plastidip , and pull the whole thing off when needed. One time use only though.
I did forget about a few good things though;
Zinc Chromate, if you can get it. Its commonly pigmented yellow/green (like old ww2 stuff). Works very well. Zinc primer/epoxy primer does a good job too. These will all rub off as soon as you start chopping, so don't forget to re-apply.