I’ve been using these and they have been working great. to knock out any bubbles/smoothing the epoxy, I just take a standard foam brush and tip it out after rolling. The first coat was never smooth for me (and I don’t tip the first coat) since it tends to raise grain, etc, but after a quick hit of 220 paper and second or third coat rolled and tipped, it tends to be very smooth and minimizes the amount of prep sanding I have to do for a finish of varnish or paint.