well guys i got through it, happy so far but there is time for the phone to start ringing yet asking me what ive done to there windows
went back to the 1st 2 that i did this morning to see how they looked and had dryed, both customers in and both happy so just hope the rest are but only time will tell.
Tanks refilling ready for another blast tomorrow, tell you summit thou my arms dont half ache
thanks for all the advice guys it being a great help.