I have a fresh jug of Zip Wax that I bought in 2000 when I bought my ZX-3 Focus. Still in use today if I get the motivation to do a hand wash. My previous jug was probably 15 years old before I bought my current jug. Just easy peasy.
^^This^^ !!
^^This^^ !!
This. I think it outperforms Gold Class.You have to order it online, but I like to use Meguiar's Hyper Wash. It's a little spendy, but you only need 1oz per 5 gallon bucket of warsh. It foams up very nice especially if you have a water softener or rainwater cistern setup.