A polyester having a weight average molecular weight of 10,000 to 200,000, a hydroxyl value of 30 to 200 mgKOHg, an acid value of not larger than 5 mgKOHg and a glass transition temperature of 35 to 60 C. During operation, the ionizable media source provides ionizable media and the precursor ionizable media source provides one or more chemical species, photons at specific wavelengths, as well as containing various reactive functional groups andor components to treat the workpiece surface by working in concert for synergetic selective tissue effects. A film or foil separating wall located in-between avoids the sensitive filling material from directly contacting the blown-in compressed air.