Quoted from Drenden:No such thing as “triple chrome plated” regardless of what the guy at the rim shop told you
Triple chrome plating is copper, nickle, chrome. It implies that the copper layer was used to fill and polish.
At least that's how I was taught.
Not shit talking HEP here, but he's someone that has close ups of his parts which are just nickle plated. You can see the surface differences that would've been evened out with a copper layer underneath.