I am looking at getting some hand pads or the polishing/grinding disc for a few DIY jobs coming up. And looking for advice on what would be the best to buy as they will only be used for DIY. I already have a rotary polishers that I can use for the discs if these are better. Kitchen splash back with Porcelain and have a mitre cuts for round the window. Will take most the meet off the tile with the grinder before finishing it. Also have ceramic tiles 600x300x9 for a small toilet that I am doing half height all way round and have 1 outside corner to do. What grits in each would be desirable? Thanks in advance.