No, the guy knew what he was doing, he only did big contract stuff, thousands of pounds a job which ranged from pressure washing the plaster from house exteriors to washing car parks and removing white lines from airport runways. His job meant being away from home for a week at a time all over the country. He had a collection of waterproofs hanging up 'cos he went through at least three a day. The day i saw him his arms were covered in chemical burns too. I'm sure some do make good money and enjoy it but it was not for me thats all.
At the end of the day wfp windowcleaning is far lighter/easier/cleaner work.