I am in the process of doing a partial drain to lower my stabilizer levels and I'm thinking this is a great opportunity to cover up some nasty staining that I have on my plastic stair entry to the pool.
I have attached a photo showing this yellowish discolouration. I have tried to clean this but it won't come off...
I'm wondering how I can go about covering it up? Does anyone know of any products that are waterproof that can whiten or cover it?