aluminium
the profiles this corner piece is meant for joining are just like most alu extrusions, angle/T section/flat bar etc...can take the scratches out/smarten them up with fine paper...
but this corner piece is rough...not sure if it's painted or what will happen if I try to use fine grit paper/wire wheel etc? I'd like to make it look more like the other alu extrusions...not a mirror finish just smooth..matte smooth, if that makes sense!

I only have the one just now...will
order more to play with but hoping someone here can offer some advice
Cheers
the profiles this corner piece is meant for joining are just like most alu extrusions, angle/T section/flat bar etc...can take the scratches out/smarten them up with fine paper...
but this corner piece is rough...not sure if it's painted or what will happen if I try to use fine grit paper/wire wheel etc? I'd like to make it look more like the other alu extrusions...not a mirror finish just smooth..matte smooth, if that makes sense!

I only have the one just now...will
order more to play with but hoping someone here can offer some advice
Cheers