johnette,
Please, please, please IGNORE Billy's cleaning instructions. They are far far far to aggressive. I have almost destroyed some of the decals on my first 66 redeye with his instructions. Those instructions should be deleted from this forum completely.
Use MUVs or Skips instructions and you'll be a lot happier.
That said, your 66 will take the most common bobbin winding tire; 15287 found here {
http://www.shop.sew-classic.com/Bobb...-Tires_c16.htm } It's the first one on the page.
If you haven't found Skips threads and tutes, here is the links for two of them: {
http://www.quiltingboard.com/vintage...s-t193635.html } and {
http://www.quiltingboard.com/vintage...ts-t97670.html }
Muv's tutes, videos and other tips are in this 8 page thread: {
http://www.quiltingboard.com/vintage...v-t167789.html } started by Miriam.
As for the polish, I use Kit Wax for cars. The non polishing type. No abrasives. I does put a protective coating on the surface but does not damage exposed decals.
Joe