Best way to sand bondo'd corners.

[thefader]

I'm rebuilding another Nintendo cabinet. On this one, the inner half of one of the sides (where the molding attaches in) was broken. I put bondo here, to rebuild this part, and saw in a new notch so the molding can fit back. Naturally, some bondo got on both where the black lip will be, and the blue front panel. How the hell do I sand this to a nice 90 degree angle?

 

[thefader]

Sorry wrong forum.. Ill repost.

 

[Jedidentist]

Any sort of electric sander should work...just don't use a belt sander. Keep it resting on the non-Bondoed edges as a guide.