Thanks.. I will try the Verbatims.. Yes the roller marks are just as pronounced after a couple of days..
I read somewhere on this site about the idea of building up the outsides of the CD tray so the rollers wouldn't make contact with the CD face.. or at least there would be less pressure.. I tried this, and it did help a bit around the edges, however the roller marks in the middle of the CD were no better.
The small rollers inside the HP 5280 that cause the marks are mounted in pairs and seems to be spring loaded against a bar above them.. It is the pressure between the main roller below and these small rollers that draw the tray in and out of the printer. I temporarily (and carefully) removed the rollers that were causing the problem, however the tray would not feed into the printer.. So I put them back in.
I have been in contact with HP and all they seem able to do is suggest printer diagnostic utilities, etc.. of course nothing is wrong. I suppose they don't like to admit it is a design problem with the printer.
Anyway.. thanks for the help.. I am resigned to using flat printables until I get around to buying another printer..