Palembang keris?

[PeterP]

Thanks for the advice, I'll give the gonjo realignment a try. It's only a little bit, but just enough to prevent the blade to be inserted all the way.
When I found the kerisses on the market I couldn't believe my luck. Probably could have bargained harder but I just wanted to do a quick getaway with the loot. It's not unique to find a keris on a fleamarket in Holland, but this quality is rare, and also for this price. Comparable to about ten good takeaway pizza's for two nice palembang kerisses, a sewar and three badeks. I think I had a pretty sweet deal..
I also wondered about a possible pendok. The quality of the wood of the sheath is not on par with the rest of the keris, pretty rough timber, while the grip and the wranka are of a very nice wood. I'll be on the lookout for a pendok, but hat's probably pushing my luck. Especially with the size of the keris, never seen a palembang one as big as this one, so finding a fitting pendok will be a challenge.
About the rust, I cleaned a few blades with pineapple/lime juice and that always resulted in a very porous and rough-ish surface. This blade has such a nice polish, a shame to loose that. I think I'll try the soak and needle method first.