Here's a link to liquid electrical tape. You might try this stuff. I've used it to repair all kinds of oddball stuff. I know it comes in black, red and white. Maybe a few others by now. The can comes with a brush inside and one can would easily cover one side of your MoBo. I'd get two for one side though, depending on how black you want it to be.
"Far better it is to dare mighty things than to take rank with those poor timid spirits who know neither victory nor defeat." - Theodore Roosevelt

-USMC Corporal Hess Sherrod B:6/6/84 D:4/6/09 I miss you, my brother.