So Dave , for years Chem-dry have been cleaning unethically? since HWE and bonnet cleaning is the only ethical way.
I bonnet clean a car dealer every 4 weeks , they need top appearance constantly , and having used 2 local Truckmount operators they decided that bonnetting was best for them, the dealer principle hmself told me this..........
Of course HWE flushes out more dirt , but then of course a Mercedes is better than a Skoda, skoda are not dishonest though are they. VAG who make Skoda make far more profit than Daimler-benz , who make Mercedes....
Neither are unethical.
To answer the original question , yes you can get the wow factor with a bonnet , I do every day. And have done for 19 years next week. For a far smaller capital outlay and higher profit margins than any HWE set up could achieve.
PS. Have done a deal with a debtor on a TM , collecting it next week