So I did another section of this terrible curb I've been skating. I did the first section without a rub brick, just Clear enamel and wax, Second section I rub bricked thoroughly, two coats of clear enamel, and then a nice coat of wax and it made such a big difference. It honestly slides/grinds better than some skatepark ledges, it's icy.
This was sort of a test curb, I wanted to work on my skills before making a better curb spot (with better ground ideally). However, just wanted to post results for anyone considering putting in a bit of effort on their curb. For a $20 investment (Rub Brick and can of Enamel or Lacquer) you can make almost any curb good I think.