Forget brushes when it comes to varnishing a ton of trim or big, flat areas like tabletops and cabinets. Use a 4-in. disposable roller and a nonstick, lipped baking sheet. Pour some varnish into the tray and use it just like a paint rolling tray. Keep adding varnish as you need it, but try to plan so you end up with an empty tray. When you’re through, toss the roller sleeve and let the wet varnish dry in the pan. When it dries, just peel the varnish film right out of the pan. Thanks to Aaron McKeever for this tip.