Son has made a frame to cover his circular fish pond, and now is going
to fit several triangular aluminium sheets to make it utterly impervious
to his new baby son.

He nees to drill something like 15, 10mm holes in the 3mm thick
aluminium sheets. His drills have failed (he says they just jam) and he
is coming to borrow some of mine on Sunday.

The sheets are 5m x 3m, and won't go anywhere near any bench drill we
have, so he is trying to do the drilling beside the pond using hand held
drills.

The 'net is full of random contradictory advice, and I've looked at the
diyfaq.

I seem to remember using something like paraffin as a drilling lubricant
for this sort of job, but the net suggests variously dry, 3-in-1 oil or
WD40. There are also contradictions about size and number of increasing
pilot holes ( 0 to 4).

Any suggestions as to the best approach gratefully received. So far I've
only found one 10mm HSS drill here to offer him.
--
Bill