I guessed that this was anodised aluminium but there is a small patch which looks like an applied material showing a more shiny appearance behind it. When I removed the low-tack masking tape, the matt face was torn off by the tape so similar smooth areas were exposed. Would it be practical to have this facing material removed without damaging the profile and re-anodised? I have a NoS one which appears anodised but there are a few deflections in the surface. Very thin material, would trying to flatten it make is worse? Frying pan to the fire comes to mind!
Is it possible a PO repainted the centre post? If so, then solvent paint stripper would remove the paint without harming the anodising. However a water based paint stripper is a strong alkali and will harm the anodising.
strange that a low-tack masking tape could pull off an applied paint - there are certainly no brush marks. Yes, perhaps a stove enamelling or similar but be an option. The anodised finishing is very bright - its usually a dull matt finish.