The SS did use white frogs with their 98/05 & 84/98 bayonets. All of the SS frogs that I have seen and those in my collection are made from a substitute material such as compressed paper. the white finish is similiar to a white enamel paint. The White SS Frogs are marked with the typical SS Property Mark on the backside of the frog.
If you look closely at the LAH Band pictures taken during their performance for Hitler's birthday, you can see the 98/05 bayonets in the white 98/05 frogs.
