With the new focused LED bulbs the reflector no longer needs to reflect. So I would say why bother? But that said......my wife polishes silver for museums, she washes first with a special soap and water but dawn dish soap would be fine. For plated items she then starts with red rouge powder on cotton flannel pads lubricated with ethanol. For a higher shine she finishes up with lamp black dry on real natural chamois and a final wash and dry. If solid silver you can start with calcium carbonate or if really blackened with tarnish diatomaceous earth but it will go through plate like the reflectors down to base metal real quick. If they are tarnished at all there will be little to no silver left when you are done as the tarnish is AG2SO4, which means as you remove the tarnish you remove silver.