Not sure if this is known, but scraping signatures to make them look engraved also works on glocks that don't have a black handle and finished slide : r/GlobalOffensive
Autograph Sticker Scraping | Scraping the new stickers will leave you with just the autograph and a little background! : r/GlobalOffensive
k0nfig (Foil) | Krakow 2017 Sticker - CS:GO Stash
Team Kinguin (Foil) | Cologne 2015 Sticker - CS:GO Stash
CSGO's Warhammer sticker capsules have some awesome scrapes - WIN.gg
Bruse Gan (@ayyyyislit) / Twitter
Steam Community :: Guide :: Secrets of Broken Fang Sticker Collection
Volkrays Creative Car Sticker Fast & Furious Paul Walker Signature Words Accessories Sunscreen Vinyl Decal Black/Silver,8cm*11cm|Car Stickers| - AliExpress
Steam Community :: Guide :: Easter Eggs of CS:GO stickers