Richard Coda , May 31, 2003; 10:37 p.m.
Are you using some sort of magnifying device? When I used to spot my prints (before Photoshop) I used a light that we used in the graphic arts business. It had a light and a magnifier built onto a spring-loaded elbow arm (for lack of a better description) that clamped onto the table. It's a lot like what a dentist uses, only less expensive. I also remember reading somewhere (and trying) pulling a few more of the bristles out of the brush, thereby using as few of them as possible. Then you build up a very small area, rather than putting too much on and getting those rings.