Possible, yes.
Sane? Maybe.
I'd do it with 100% pure distilled water, then dry it in a humidity free environment with forced air to ensure that ZERO moisture remains on the board, or under any chips.
Bleach is poison, which is one of the reasons a ton of countries have banned it's use along with chlorine. If you have it, toss it and get something less likely to kill you with a few milligrams.
As for the 280c itself, a thorough HD wipe and compressed air blowout should clean it's insides nicely. I recommend a light water / lemon solution 95% H2O, 5% lemon from a lemon and the casing will shine like new. Also, no chemicals involved. This makes gaia happy.