I don't disagree with you fellers on the rotary scrub
but honestly, how many grease pit restaurants are paying what it's worth for a "normal" clean?
let alone a scrub and extract....
Do what Jimmy said
or you can boost with 4 oz pr gal of
Ultrapac
lay down the pre-spray HEAVY and give it max dwell time
as in... nuke the worst spots with pre-spray first, THEN set up the TM
(or porty, I didn't look at your profile to see what you're running)
..L.T.A.