3M Wetordry sandpaper cuts fast and smooth, and it can also be used to repair surface defects. It can be used with water or cutting oil. Ideal for sanding metal for repainting or prior to primer coat.
3M 09087, Wetordry Sanding Sheets 9087NA, 9 in x 11 in, 220 grit, 7010383682, 5 sheets per pack
$2.99
Factory Stock, 7-10 Day Leadtime, Priced Per Pack
3M Wetordry allows you to sand between coats of varnish and paint or other finishes. Can be used with water to reduce clogging and extend abrasive life. Ideal for sanding metal for repainting or prior to primer coat.

3M 04028, Scotch-Brite Hand Pad 7448, HP-HP, SiC Ultra Fine, Gray, 6 in x 9 in, 7100089226, 60/case
3M 22395, Roloc Disc 361F, 60 YF-weight, TR, 3 in, Die R300V, 7000045098
3M 45714, Cubitron II Hookit Cloth Disc 947A, 120+ X-weight, 3 in x NH, D/F 3HL, Die 300BE, 7100113113
Standard Abrasives 78513, Ceramic Pro Type 27 Flap Disc, 645110, 4-1/2 in x 7/8 60 Y-weight, 7010369540, 10 per case
Dynabrade 78589 1/4" Dia. x 2" W x 1/8" Center Hole, 120 Grit, 100/pack
3M 07413, Hand Sanding Stripping Pad 7413NA, 4.375 in x 11 in, Green, Coarse, 7010383727 
