im no expert pal but i have just g3 on my escort just keep the buffing mop wet and the panel wet put a nice dab on the mob rub on panel the put the machine on medium to low speed not to high dont stay in the same place keep it moving the wipe off whats left should be paint color then give it a good wash then a hand or machine polish the shine doesn't rely come out till the polish is applied. g10 is just a finer compound and i wouldnt say is rely needed if you are selling it on will look good enough