Lord Beer's Switchgear

Well I might be being picky here, but since Lord Duffers work has enhanced thy Superdream 10 fold, I'm looking around at things which aren't quite right, so the switchgear, particularly the right hand side, works perfectly well but the finish is quite worn 





Basically the black finish has worn off, so has anybody refinished said switches, if so how?, or should I leave it and stop being such a fanny, oh and



Can't get enough of this, endulge me 👍🍺