Jonny you are the customer mate so if you ask for high build primer & you want him to rub it down before top coat then that is what he should do .but it will cost you more for the extra labour .if you want a high standard then it will cost you time & money to get the best finish you can get .
i will be using acid based etch primer then high build two pack primer inside ,then base coat & lacqour .for the under side i will be using etch primer then body line smooth stone guard ,then base coat & lacqour .
if you scrimp now you will more than likely regret it at a later date .

hope that helps mate.