alas, when other family members invite guests they do not specify shoe soles. so now for our hospitality , we have black scuff marks at various places on deck. (the black marks are not as bad as the lady who came on boat with fresh bright red toenail polish that was n't dry and left streaks. she was upset that she'd messed up her pedi-cure. i was upset the spouse had invited her in the 1st place...) I use FSR and that's a pain. any other suggestions from the group ?