[etcc]

For optimum results you really need to spray the conductive coat onto the project you're plating to get a 'smooth coating'.

You've already discovered that the brushing technique picks up the tiniest detail of the brush marks.

Longer plating time wont fill them in or make them go away...just enhance them all the more.

Silvaspray works great...but follow the instructions carefully as the 'secret' is all in the preparation for optimum quality finish...'before' spraying Silvaspray.

You must have perfect adhesion otherwise you'd be just wasting your effort, time and money.