Would dying get rid of this?

[ATL]

So these are the Acorn Freestyle wheels off of the BMX im restoring, the mags are in good condition, but they have these small white parts in the surface, like powder but you cant remove them, like they have been cleaned with something abrasive.

Anyone know how to get rid of them?

[ORB]

2000 grit wet n dry and plenty of soapy water.

[meticulous]

nawww! 40's....

[ATL]

Ok il give the fine wet and dry a go.

And what do you mean 40's???

[meticulous]

sorry mate, just being flipant, 40' is just about as course as it gets, dont use it
start with 1200's then 1500's, the problem with 2000, one rub with it and its worn flat