hit up nates favorite spots....i did.
homedepot
lowels
they have the right size foam wraps that cover your tubes. and they are self sealing.
for the board.
what i have found that works fairly well
front of board
1: eraser
2: shop towels
3: something in the center of the cpu block (your choice)
4: a neoprene cutout to cover the top part of the block like a blanket
back of board
1: eraser
2: shop towel
2: neoprene
3: bottom block
4: neoprene
5: shop towel for the 4 screw heads. once they start getting cold and wet...they will drip water.