All the PC i have had done - bike frames, table legs, various other bits - the provider (J G Powdercoaters in my case) - they first sand-blast to bare metal, then powdercoat directly - they even do a clear powdercoating...
Otherwise maybe use a nut & bolt - but tack-weld the nut onto the bolt at the top side, then spin the whole lot in your drill while you "sand" the OD (hex) of the nut down with your angle grinder until it fits the access hole? Essentially creating the same shape as the original installation tool?
Controversial, that air-shock, indeed.
@Dean77 has one (or even 2) with air-shocks, and has no issue, likes them even - as do various other members here. Mine arrived with a replacement M2P adjustable on the rear, and I like it a lot - cant see why I would ever change it. The front could always...
BMW G650 X-Challenge
Not many made, those that have them love them and swear by them, light, powerful enough, good suspenion generally, LIGHT (144kg odd)
And yet never really did anything in SA - R40k will get you a decent one - in Europe they cost E5000-E7000!!!
I have always wanted one of these - this is listed ass a 2011 - but its eaither a 2008 or 2009 - the 2010/2011 had gold forks and an upgraded gearbox etc., and this one looks like its been used some - its the BMW version of the 500EXC-F really!