Question about parts quality

Hi I just bought L6 robot arm from some ebay store in UK.
All lexan parts looks not great (very dirty and some places looks slighty overburned) it is normal??
I made some pictures I can send them. I’m just wonder that mayby somebody is cutting those parts privatly and selling them as lynxmotion oryginal parts
regards wpikula

The lexan pieces we ship have a protective plastic covering. You’ll need to remove this covering; it is what looks dirty and burned, not the lexan itself. Take a look at this page for more information:
lynxmotion.com/images/html/infolexa.htm

Thank’s very much for quick answer now everything is clear:)
best regards wpikula