Wooden objects of cultural and historical heritage may be severely infested and damaged by wood-boring insects. Procedures to eradicate and consolidate such objects, for instance polychromed sculptures, are well known and described (see for instance Unger and Unger, 1994). For eradication, most often a fumigant was used. However, chemical fumigants may permanently affect some surface pigment systems (Koestler, 1999), represent threat for the environment (Stusek et al., 2000) or endanger the health of the people treating the objects (Pinniger, 1994). A safe and effective alternative insect treatment procedure is an anoxic gas treatment with inert gases (Koestler, 1999; Stusek et al., 2000).