Chainplate weep holes question

[Taniwha]

Hi,

I've read a few posts where Brion has recommended drilling a few "weep holes" at the bottom of the pockets of encapsulted chainplates to allow any moisture accumulated either through condensation or leakage through the deck holes to bleed away, thus eliminating one potential problem for encapsulated chainplates.

I have a couple of questions that probably come under the "dumb questions" category about that.

1) what size holes are appropriate? I'd assume small - maybe 2mm (1/16 - 2/16")?

2) I also assume that these would be on the outside topsides of the boat, not the interior? If that's the case, would salt water coming into the holes when heeled have the potential to be very corrosive?

All input on this would be welcome.

Thanks,
Paul.