Cleaning

I ordered a couple rings in White, Strong and Flexible. They seem to collect dirty pretty easily and I didn't know how to clean them.

After cleaning, can I coat them with something to make them less grainy, so it will not collect dirt as easily?

WSF is very porous, I'd try soapy water to clean it. Look in "Post Production" for ways to seal it.

I've actually run WSF through the dishwasher, so its safe to give that a try. When it comes to sealing the models, I agree with what Michael said -- people in the Post-Production part of the forum will have some good ideas.