In 1/35, you could just about use a paint roller, available at any hardware store!
Seriously now, I use a fine tip brush, lots of patience, and a steady hand. Barely touch the tip of the brush to the paint, and do the same where you want the paint. I usually get only one dial/needle per dip, but can get a few tic marks on the instrument per dip. Works the same for lettering/plackards.