I found this site quite interesting if you know very little like me about resin surfacing http://www.pavingexpert.com/resin.htm
I did a large domestic (multi million pound house) extensive granite sett & sandstone drive for Tony Mccormack (who owns the site) in Cheshire.
Beautiful sweeping drive, 3 of us for 10 hours.
They had brushed in resin mix between the setts and sandstone, industrial grade, all finished really well.
We had to clean it all down.
Started cleaning and I couldn't get rid of dusty brush marks.
Told him and then told the client (homeowner) the problem. I suggested the drive had been sealed and the brush marks were underneath the sealing layer.
He was adamant that it had not been sealed.
I said I can't clean this, it was a four figure job and said because I wasn't getting the result I expected we wouldn't charge but wouldn't be doing anymore.
We were asked to carry on by the client and finished about 6 but we couldn't resolve the issue.
I sent the invoice to him and the client refused to pay.
I started legal proceedings and got the money.
The manufacturer was approached and It turns out there is a seal in the resin mix that can take up to four months to break down by sunlight.
His work is exceptional and very high level but he doesn't know about our side of his work.