NoHairNoFair,

Some wearers complain that their systems arrive with hair that looks TOO healthy and ask how to matt down the shine.
Once styling and grooming products are applied, the sheen or dullness is masked.

I take it you're not a wearer yet because if you were, you'd appreciate that this is likely to be very low on your list of issues regarding wearing.
Initially, there are much bigger hurdles to overcome!