If you shine light from a bulb directly onto a reflecting surface you will get reflections (glare). Shine the light away from your shiny surface, perhaps onto a matt white reflector of a large area which in turn lights up your shiny surface, this time relatively glare free.
For direct ligthing you could try various diffusers but I think by the time you diffuse your light source sufficiently to stop glare you lost a lot of light in the diffuser.
Klaus