Paint for Glass Patio Table?

I'm having a great garden makeover. The garden rockers have successfully been re-vamped, I now have a movable pallet coffee table, and have also got a brilliant (surprised how good it looks) pallet vine support.

I also have a serviceable (but tatty) patio dining table. So far I've painted the metal frame with bog standard black exterior metal paint - it looks really good. Now the question is what paint is suitable to paint the glass top? I've seen loads of small, craft type tubes of glass paint on the market here, but I need a larger amount to cover the table top (approx 6' x 4').

Anybody successfully done this? If so, what did you use?

Thanks :-)