If you don't have such a filter, cheat with a test run by using your Polaraid equipped sunglasses.
Also "glare" is a direct effect of lighting. You need more diffusion on the light source.
I am an artist and paint on gourds. Each gourd is then protected with several coats of a high gloss sealer. I need photos of them for the web but can't seem to get them for the glare. I have tried different angles, side lighting, etc. So far nothing works and the glare blocks out a lot of the details. Any suggestions would be gratefully appreciated. I am using a Canon Optura 10 Digital Video Camcorder which takes GREAT pictures. But I am new to photography. Need help now. Thanks