I wait till the leather is extremely dry and use an artist's brush and I wipe off most of the dye from the brush. I'll drop the dye short of the line I'm trying to maintain till I'm sure it won't bleed. This means maybe two coats to get it right. It is what it is. Be patient, brush it thin.You did a good job on the dye. I have found it really difficult to not have the dye bleed into surrounding areas.