Drilling enameled steel tub
How can I drill an enameled steel bathtub?
I want to install faucets on the rim of the tub.
Thinking of grinding carefully the enamel before using a regular HSS holesaw.
Another idea would be to score the enamel using the holesaw in reverse before drilling.
Failing that maybe using an electrician knockout punch was suggested somewhere on the web.
Any better idea? Has someone done it before?
Thanks in advance.