Mine are painted wires with bang-on weights .... my local tyre fitter seems to have no problems balancing the wheels on his normal machine.

As for your query ... I've had several sets of race wheels balanced where, because of caliper and suspension clearance, the weights have to be restricted to quite small bands of the inner rim ... they huff a bit but have never failed to balance the wheels in spite of the constraints ... don't let them fob you off for an easy life ... even if the young lad has to hand the job over to the experienced old-stager! 🙂

K