layer it up gradually, work the mors into the paint in 5/10 minute stages, 3 or four passes should be enough,
and blob it on with the end of the brush, not in brush strokes,
try using an aluminium scourer pad too if you want to preserve the finish of the chrome beneath,
dont expect the paint to just bubble up and fall off, some paints/powders are tough as fook, some bubble up others come of like gel,
dremel wire a brass wire brush helps too,
good luck with it,
i love the stuff personally