The Bilt Hamber kit is pretty good value (Hard and soft for £20) and it uses water as lube. Might be worth looking into. There are maybe ones that perform better but I can't knock it and it's good value. (Thrifty Furrybootser!)
https://www.bilthamber.com/autoclay.html
As for the polisher, my mate uses one on his 98 Golf Turbo. It's red and looks amazingly shiney. There are maybe better things about but it might be worth a try. Find another car to try it out on if you are unsure....