Rolling on your side or on your back with a small foam roller perpendicular to your body is a good way to self - treat the glut med / min muscles. (physiologicnyc.com)
For the second coat I used a small foam roller for an even finish but you may also use the same paint brush as well. (cityfarmhouse.com)
Its easy to see brush strokes in a sealant with any kind of sheen so I used a small foam roller for the top. (thepurplepaintedlady.com)