Use that and a firm wire brush to clean them off. Take the terminal wires off if you can, give eahc of them a nice brush, then hit em with some 750 grit sand paper to smooth out the pits that corrosiion can cause.

2006 Pontiac G6 3900SFI GTP Coupe CAI, Stainless Cat Back, Vector Tune, Strut Brace, Eibach Pro Kit, Custom Made Projector Headlights, 4300K, 20% Tint Former Owner- 2000 "Stryped" CSVT CEG Dragon Run- Oct 13-15