That will not stop it as quick as just have them address the issue, they cannot put that in place to quick a lot more guy's run foam VS outerwear that would not be prepared to change them, Seems pretty simple NO track should want any cheaters you point it out they watch for it when he comes to the grid they pull the foamy ,give him a new one to put on to race that gives them time to examine the foamy and monitor his performance see if there is a speed change then deal with it accordingly, I've been in the track promoters shoes I would handle the issue head on NOT put my other racers out requesting them to switch to something they currently don't have.