johndiver999
Contributor
I am pretty sure this is what I have used to mark rubber fins with a broad stripe of color in the past. Not too expensive and needs to be re-applied every once in a while.
https://www.grainger.com/product/5D...s_kwcid=AL!2966!3!50916716397!!!g!82495734597!
https://www.grainger.com/product/5D...s_kwcid=AL!2966!3!50916716397!!!g!82495734597!