I will apologise in advance if i am going to upset you////// Hi m8 this is a polish for your normal subaru driver who wants a quick ,not 5 hours slogging away detailing as you call it A finish that lasts a wee while, easy to use gives good water repelent qualities cleans windows stops brake dust sticking etc. I have seen the results of this product and if it impresses me and merc valleters, merc and subaru lovers in scotland then its good enough for me in my opinion ,and for most owners a car is there to be used not sat in a garage looking well polished. just to add, teflon is not a brittle coating, tell that to DU- PONT I used teflon for 20 years in rallying in the scottish championship , used it in my high performance police training traffic cars at the tulliallan police college, IF its good enough for milltary jet fighters , airliners, tanks, hellycopters , NEED I SAY ANY MORE GEO