The existing anodising will need to be blasted or dipped and removed before the new coat can be applied.
The striping will REMOVE material
Anodising will ADD thickness.
The finished difference will be negligible and have no affect on function.
I would advise getting it HARD anodised, this is is thicker and tougher than normal, it is usually a dark grey colour which is very professional.
Anodising thickness is microns