I think the viscosity of the melt and the crystallization of the polymer will make it not easy. in addition, it will not be easy to peel the film. hot-press is normally used to prepare polymer film from the melt. PTFE or other materials used to separate the metal surface apart from the polymer melt to facilitate peeling, and quenching in cold water is used to prevent crystallization. hope that will help.

Your question includes many different aspects, difficulties, and inconsistencies. Non-polar polymers like PE, PP could be option to peel away easy from many solid surfaces. But, their melt viscosity values are extremely high to make a dip coating. Moreover, I think, you cannot apply a dip coating process into a polymer melt as simply as you do in a polymer solution to obtain a thin (?) film. You have to take into consider many parameters (oxidation, degradation, viscosity, temperature gradient, crystallinity, thickness variations, surface tension and interactions between solid-melt phases etc.) as Al Lafi pointed out. Thermoplastic melts generally form a thin film via several casting methods associated with streching and cooling operations at the same time not dipping.

I know you said "melting" but if you are just looking for a way to replicate surface features, EVA glue does a pretty good job, and is easy to peel from many materials.