Do not use the Clay Bar on the vinyl decals, it can cause damage. Yes, you can use VRT on the vinyl decals. You can also use H2O Guard & Gloss to protect the vinyl, as shown in this post: http://www.fordraptorforum.com/f36/first-detail-adamized-raptor-33281/index61.html#post1000551 More info on vinyl graphics from The FAQ Thread: VINYL GRAPHICS – Gloss vinyl can be treated with the same protection products as the paint. Matte vinyl can be stained by most sealants and waxes. Protect matte vinyl with VRT or H2O Guard & Gloss. Do not clay or use a machine polisher on any vinyl. Matte vinyl can be cleaned by hand with either Revive Hand Polish or Brilliant Glaze.