How rugged is
this KB? Will it take water, and relatively hot water
too?
Any keyboard will take boiling water, at least on the circuitry. During
manufacture circuit boards are washed after wave soldering in a 200
degree spray (ph isn't neutral, but I don't remember which way it
swings).
The only concern is the plastics.
I've washed all my keyboards (incl Sun) in dishwashers on regular cycle
with a little detergent (NOT Cascade or other powder detergents that
contain sand - use liquid). I don't recommend using the drying cycle.
The trick is to chase the water afterwards and I use isopropynol
(rubbing alcohol) to do that. Isopropynol binds to water and will take
it away as it flows off the board.
Follow with a hair dryer and a day or two in the sun.
This also works for rescuing electronics that have been dropped in
lakes/oceans if you get to them quickly.
Umm... don't Sun type 5 keyboards have capacitive foam pads?
How will the introduction of any fluid affect them?