"gaz" posted the correct method in:


I have had some success using a piece of
thin plastic (A B&Q drilling guide for handles for instance) against one
edge as a shield, but you must wipe it every time or it just spreads the
paint around.

Break the handle off a saw or buy a painters thingie. They have a sort
of edging tool/spreader made of plastic with a wooden edge the length of
one side for an handle. A steel ruler will do but is a little on the
thin side.

The problem is uneveness in the surface in the angle. Have you tried a
paint pad?


--
Posted via Mailgate.ORG Server - http://www.Mailgate.ORG