I have a Panasonic DX-3000 from the mid 1980's. It's in very good shape, and from what I can tell has mostly original parts. I'm in need of a project, so i'd like to completely strip the bike down, clean everything, and build it back up. What I'm wondering is, are there any parts I should try and replace while I'm doing this. Specifically I'm thinking about parts such as the bottom bracket or headset, where I can replace the current piece with something with sealed bearings. Would this be worth it, or should I just leave it as is since everything seems to be working fine?
I'm also contemplating whether to have the frame powdercoated matte black. Right now it's that black/yellow combination, and I'm not a big fan of it.