Gazelle? Does anyone know anything about them?

Not likely, but I would recommend an accurate refinishing anyway. Thuss wetpaint in authentic Gazelle colour and the right decals. Of course it is a quite an investment, but with a 753r it is easy to justify. A powder coat will pretty much ruin merits and resale value however. Such you could consider with a beat up A, but not with a 753r imo. Moreover a wetpaint would be easier to get rid of the next time you would consider a refinishing.

Is wetpaint a synonym for stone enamel?
I might be able to get this done after all.