My car is primarily a SCCA ITA car with the required stickers. I do use the BMWCCA number boards (which I was requested to cover at the SIC), but all other decals are SCCA only required. The other required decals are mounted on 1/16" mag material, available from McMaster, and added before the NASA or BMW club race. Just be sure to tape the leading edge of each decal My car is small...if I had to run all the decals all the time, I would have them overlapping. This weekend, I think I will just put all the NASA decals on the trunk lid....after all, they would be on the car Chuck