I forward more from the technical wizards at Glubco:

>>>>>This polarization reverses at
>a high frequency causing mechanical stresses between the surface and the
>paint. Eventually the weakend bond breaks under the intense electrical
>fields and the paint "pops" off. Also thermal expansion of moisture in the
>base material can cause the paint to peel off from the coil as the RF
>energy produced causes moisture to vaporize.<<<<
>
>Would you expect the temperature of the paint to be raised above 1100F in
the process?
>
>John Leeke, Preservation Consultant
> 

Every material, especially polymers such as paint, are effected by RF
energy. All non-conducting materials have a power factor number associated
with them. This number describes how the polarized molecules in the
material are heated by themal motion induced by the alternating elecrical
field of the RF energy. The higher the frequency the higher the
temperature. This is how a microwave works. However, the paint would
probably be removed so fast that its surface would get chared but it might
leave the material underneath in tact.
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