Sawyer oars have epoxy coatings on the outside (this is different from Cataracts - Urethane varnish I believe). So for the dings you should get a good 2 part epoxy from System Three or West Systems. These brands are available at Plasticcare in Denver off South Santa Fe. ((303) 781-1171 - 4211 S Natches Ct, #K, Englewood, CO). Expect to pay about $40, but that amount will last a long time.
They also have filler to go into the 2-part epoxy to make it thicker to fill in the dings. The stuff is straight forward to use, but be cautions about using it it in the midday sun and heat. I had a batch start smoking on my earlier today - not good. Do the repair in the shade if you are working during mid-day.
As suggested in an earlier post you could carefully use a lighter to melt frayed ends down on the rope. Of course that is assuming the rope is a synthetic and not a cotton or hemp wrap. Your best bet is to call sawyer directly, get their advice, and them post it here so we can all be a bit smarter.