Neil , what machine are you using ?
There are different methods to clean decks from chems , pressure , wood orbitors ect . They all have there uses and its a matter of what does the customer want. If you are going to completely restore a deck from scratch like what Roger does then it comes with a price tag .
Nothing wrong with FSC if used correctly ie not too much pressure , avoiding ring marks , blending in edges ect.ect
Just done a three tier deck on a riverside property, just used a lance and blended everything in.
Ed