Vintage be careful. Surface dust is fine. If it need a cleaning leave it alone unless you know how to clean it without harm.. No windex. Just a damp cloth, if its dirty use a warm soapy lent free rag. Pull the knobs and soak them in ivory. Dry and any tough stuff just use baby oil and work off the grim with CLEAN soft lent free towles. and cotton. Never Dull is great..
OR throw it in the trunk take down to the car wash and preassure wash it..:-)
Regards