Hi all new here with my buisness i use the Autoglym brush wash concentrate as it is designed to lube the brushes with massive suds (people who wash there cars with a brush just shouldnt really) so if it can lube a brush it defo lube a mit, the only thing is it has no water repelant in it like the conditioner, the conditioner dosnet seem to sud as much unless you use loads, it still lubs really well, and also it does have anti rust inhibitors too. Gold class is nice to use but the best concentrate ive found is the dodo juice.