I know this sounds crazy and some may not agree. If you are looking for a big upsell and an amazing shine on vinyl, use future floor polish it works great on vinyl floors and also vinyl siding, Mad results. It's clear and has to be wiped on with a rag. It is the slowest time of the year here in Florida so I never minded doing it. You can really make it shine with this stuff. Wax the car, why not wax house?