I have a Dan Wesson 357 Monson that's needing fresh paint on the rear sight, which includes keeping the white inside the etched groove. My plan is to remove the paint (0000 steel wool?), clean with alcohol then paint. Black paint first then the white 'u'. Any technique/tool recommendations for painting that tiny, white groove in order to leave a straight, sharp line? (Not so straight now, that left side, eh?) I suppose plain-jane, flat model paint will suffice but I'm open to suggestions. Thanks.