Hello everyone and apologies i never replied to previous comments. Got Covid and forgot about everything else. Foggy head and could not count up to 10. made it round to cusomers house who had complained about scratches on sills. i was lead to their conservatory where at first glance cound not see anything and was about to walk away away and show a red card for time wasting. But I then saw lots small scratches on sills and frames just above sill at bottom of conservtory window. Not a biggy and you would have had to look closely to spot them. Customer then said not a problem now but when dirty rains comes !!! the small scratches fill with dirt and are more noticable. At this point I wanted to hit the customer. Just recovered from covid and strugging to stand and i am dealing with a OCD customer. Could unserstand if new conservatoy but its 20 years old. Does anyone have expereince or know if PVC softens and deteroiates over time, enough to allow a brush to EASILY mark it. These are lower sills and would of been brushed gently really but have clearly made marks, but interestingly not on other frames on the conservatory. Dont know what to do really. May just accept no responsibiity, bin customer and move on. But if this is a problem on old conservatories I would like to know before I take on more. Well I say that I am 80% commercail but dont need hassle form that 20%. What is this pink stuff you talk of. Thnaks and enjoy the weather.