Eliminate annoying brush strokes by applying your water based varnish top coat with this handy to hold sponge applicator. (check out the Carts & Millie satin top)
Just pour off some varnish into a dish, dip the sponge in, and then wipe on.  A real game changer.
I also use these for applying paint on fiddly areas like chair legs AND for paint blending!
Just make sure to keep in their bag so they are dust free.