yes paint it, then resubmit it for a better grade, kep in mind all resubs are automaticly dropped one letter grade lol, to bad to, if you would have painted it prettty like, i'd of given you an A
There are some how-tos on instructables.com for similar housings.
This one is prettied up nicely, while this one is pretty ugly, but includes a water detecting alarm, and this one is my favorite because it is so simple.
for smaller cameras like that, you can go to bed bath and beyond to get one of those clear sugar jars with a gasket. I used that for a lot of wakeboarding videos and took it down 10ft in a pool and seemed to work fine. If your camera has a remote control, just put it in a couple ziplocks or bags that can seal so you can initiate the record function.
I'm off to the plumbing store tomorrow. I am really excited about making my housing. I think this summer will prove videographically interesting. Also want to try to recreate the scene from 300.