Hello I recently purchased two Gyeon MOHS 30ml kits one for my not so daily driver 2006 GTO and for my oldman's 2015 Azera. Today i noticed the sale on the kit + booster. I read the product description and write up about booster and have a few questions.

1. If I purchase one 30ml bottle of booster will that be enough for both cars?

2. If it is not enough product considering that the GTO is not a daily driver (rarely sees rain if at all) is an application of booster as a top coat going to be really beneficial and worth the added cost?

3. After reading several threads, videos, i have seen folks recommending 2 coats of MOHS. if using booster do you need to perform two coats of MOHS?