I realise that everyone is against soaking but that aside .... after the soak did you let it run / climb through a camp , rough textured towel ??
That usually helps with any old satin in my experience . You just keep feeding his head under the towel when it comes out the other end and do this for a few minutes ... Just one thing if soaking and bathing is such an horrendous torture for the poor things why do so many love swimming in the wild ... isn't the Florida glades overrun with thriving Burms as we speak ??
We are not talking about Burms here though. We are talking about a ball python.