think wire wool with leave deep scratches so will a brillo pad
ive used these and worked badass
http://www.wipexindustries.com/kitchen-scrubber-463240.htmldont know the name of them but i found them at our local dollar store think 10 for 2 bucks or something there cheapo
i took the xb controller apart and started well...... scrubbing it lol with no water or anything with minimal force i wasnt digging into it
after a few mins i did a last scrub down with water for another few mins and let it dry
that pad will remove like a ps3 logo on the ps3 controller with little effort
if you can find something similar i would recommend those