Sand and oil, sand and oil, sand and oil... At least you can see the progress as you do it though.
I've got another project lined up but probably not until next year. A couple of years ago I got a cheap tele kit and a battery powered amp and combined the two. I'm happy with the sound and it's sort of playable but it's completely unfinished, so I'm now tempted to strip it back and do a decent job on it.
But I'm also thinking about hacking apart a stereo amplifier and building a mono auratone-type speaker (one channel of the amp is dead), and I have a band EP to finish mixing and four solo EPs to record and mix.
So it might be a while before I get round to it!

The logo says 'Yorvik', which was the old viking name for York - just though it was a bit more interesting.

Good luck with the ES-3, there's a lot of sense in having a couple of builds on the go as you can make progress on one whilst the other is drying.