fill a sprayer with diliute brick acid and spray it will be quicker get the customer to watch this as it froths up and cleans then say if this dont work nothing will
do a over kill with ppe ,ie masks visors water proofs wellies etc ,what they dont know wont hurt them ,just tell them to stand back and watch , hey at least you will look the part lol and they think they are getting something they know they cannot do them selfs this should solve the prob
take it from me
as you will no a turbo lance cleans way better than a whirl away
but i always make a song and dance about my whirl away
not that in my opinion beter than just turbo lance
it makes the customer think they are getting the vip treatment over just a guy with a prresure washer if you know what i mean
i just use my whirl away for rinsing patio drives etc looks the part where it is the turbo nossel which has done the work
as ringo once said its all in the mind you know