Lots of manufactures and aftermarket wheels are now diamond cut. You can tell this by looking at the face of the wheel and this should look like the back of a cd (i.e. the lines and brightness) and will be a different colour to your inserts. We have in house the cnc lathe and fully trained technicians to refinish these wheels, this is added to the powder coating process the rest of your wheel will go through including baking on an anti-corrosive spray to seal off the fresh cut surface before applying the powder lacquer, this is far more durable than wet lacquer which is what a lot of other companies use.