Isn’t varnish shit unless it’s done really well?
Yeah, its best floated on, and you can buy a special brush to do it with.
You’re laying down a really thick coat from the outset, keeping a wet edge as you apply. It’s not a case of spreading it over the entire surface in one go, going back and forth to get the coverage, but rather as a strip, the width of the brush.
I’ve little experience of proper varnishing technique, mainly as I prefer french polishing or oil for ease on a surface that isnt going to get much wear, but it is quite a skill and requires practice.
Externally i prefer varnish, but slapped on, sanded and multiple coats, or a good oil based paint.
Oil doesn’t really penetrate as far as some imagine, and if you take a piece of timber, properly sanded, then oiled and cut through, you see the oil penetrates to less than 1/2 a millimeter. This is why it needs regular maintenance and something like Danish, where you can build up 40 coats(like French polish) always gives a better harder wearing surface.
My table was 180, 240, 1000 because they are the three sanding discs I have for my orbital sander.
I remember reading something a number of years ago about sanding to extremely fine grits, 2000 or 3000 as it provides a clarity of figure and grain when used with something like French polish as French magnifies the surface. Something I’ve yet to give a go.