Waxing etc. - the long term effects ...
I don't have strong feelings one way or the other about wax or other polishes. When they leave us the pores in the veneer of Harbeth cabinets are sealed. That implies that any subsequent treatment with oils, waxes or polishes will slowly build up a molecular film on the cabinet surface and seal-in the surface dust. Conversely, wiping with a clean, slightly damp cloth, will remove the dust film.
I think that the comparison between these two alternative approaches becomes evident after a few years: the cabinet that has been routinely oiled/waxed/polished looks more lusterous, but more 'old fashioned' and not as clean and fresh as its original ex-Harbeth condition. As with everything, cosmetics are a matter of taste: there would be no difference in the acoustics.
Incidentally, did you know that Harbeth veneered cabinets are veneered on both the oustide and on all the internal surfaces? Admittedly, the internal veneers are not as attractive but they are functionally critical. Just another one of those tricks that we have up our sleeves and take for granted here.
Alan A. Shaw
Harbeth Audio UK