So I let that dry for 2 days before sanding flat with 320 grit sandpaper and starting with the varnish.

This is after 1 very light coat followed by a more normal coat. I'm using bondall 250ml monocel satin water based clear wood varnish applied with a foam applicator







Looking good so far.

I'll be spending the next couple of weeks applying 2 - 3 coats then letting it dry for 3 - 4 days before sanding back and repeating until I run out of varnish.