A mate has an air bnb property which has access up a chequer plate fire escape. At present its painted in black paint. He slipped and fell on it so as asked me to make it less slippery. I was going to repaint it all in a non slip paint. He saw a picture of one that had the nosing painted a different colour which he said would help instead of been all black. I told him it would be a pain to paint a 30mm nosing on each tread with it been chequer plate so found some none slip GRP nosings in yellow grit finish that could be stuck on each tread. Not sure how they would stick with been chequer plate? but a lot easier than drilling each one and using self tappers though the steel treads. Any suggestions?