Cherryville Chuck· Retired Moderator
I painted a front deck on my place once and didn't want it to be too slippery when rained on. Home Hardware up here had packages of grit you can stir in the finish that takes care of that. You stir it into the can and have to stir periodically to keep it suspended. It would probably take care of your slipperiness. It wasn't very expensive as I recall.