1. Can anyone recommend procedures and products I can use to care for the hull?
I'd love to know of something that would work well. Your hull is probably rubber, so I'd start with some sort of silicone agent such as you might find at a dive shop. In the end, even if your skin completely falls to shreds, keep it as various companies (including Klepper) can make replacements using the old skin as a pattern.
2. Does anyone know where I might find replacement rod holders? I want to re-fit all of the ribs with a new set, so I'm trying to round up 16 of them.
If memory serves me right, the KM still uses Klepper standard rod holders with one rivit hole. If so, no worries, you can easily find replacements from either Klepper or Long Haul. If they are the double rivit holders as were used in Klepper Super Master and Klepper Passat, you may have to mill some of your own out of high density plastic. I had a set of 14 of these as recently as last year that I sold on E-bay. If you need any other Klepper Master specific hardware, PM me. What I have left is all down in Olympia.
3. Along the coaming, right where the oarlocks should be, I have metal pegs that fit in the 1/2" diameter holes on each side with nuts on the underside that secure the pegs to the coaming. Are these pegs intended to accept oarlock (with female stems), or are they used for something else?
Yes, these are oarlock mounts. Unfortunately I E-bayed the oarlocks I had last year as well
4. Finally, do you have a KM? I would love to chat with you about how you have used it and to learn about some specific issues related to this neat little boat.
No, and I'm way envious.
Never-the-less, I have developed a lot of wisdom in sailing the AE II and may still be of assistance when it comes to sailing a small gaff rigged/leeboarded craft. I'm up in SJI, -where it's great for sailing, so we might be able to go out in our perspective boats some time and compare notes. Also, somewhere among all of my stuff is a Klepper manual on boating, -In German