I picked up this polishing compound called flitz. www.flitz.com With the compound i polished all my internal metal to metal parts on my glock 23, polished the feedramp, and polished my barrel. My glock looks pretty cool now with my shiny silver colored barrel. I wish i had a cam so i could show pics of the results. I highly recommend polishing your metal parts. Racking my slide is much smoother and my trigger feels so much better.