Hey, Markie! I think maybe your friend has a Tmod, as I've never built a 26650 mod, and I definitely don't do regulated... Hit up Tom over at Tmod Customs. Or better yet,... Hit up the other Tom over at Catfish Atty Mods. He's got a new DNA 200, regulated mod coming out. He'll get you fixed up.
To Rossum's point, yes indeed, that is the purpose of the brushed finish. The thing is,... the smoother the finish, the more scratches show up, especially if they go against the grain....
To Nauti's question, bead blasted would probably be a good option for scratch resistance, but you already have a 7068 mod that's blasted, so you already knew that...
My buddy Wes, with the blast cabinet,... will be going on vacation Friday... He'll be gone until the 12th...
I could put a rougher textured brush to it.... That'd help keep scratches from showing as much...