enhances the release properties although the insulating paste the polyester resin for example does not attack the graining paper at all the film formed by that resin when cured cannot be used in a second repair procedure because the grain embossed into the insulating film while curing may not match the grain about a damage in a second material to be repaired the insulating film has to be formed in situ the formation of an insulating film in situ from a paste is considered an important feature of the procedure of this invention the use of an insulating film forming paste to eliminate the critical timing problem in the heating step of plastic repair procedures in accordance with this invention allows the repair procedure to be applied to what are called 34 expandable 34 or 34 soft 34 vinyls which are in widespread use in industry today these vinyls are called expanded because they are formed during the manufacturing process and have tiny air pockets in them as a result this type of vinyl is particularly sensitive to heat and thus burning or discoloration of the area around a patch is common moreover these vinyls are typically thicker than conventional vinyls consequently a relatively large amount of patching compound must be used and an equally greater amount of heat is necessary to cure the patch only with extreme care and a special heating tool have completely successful patches been made in expanded vinyls with prior art procedures with film forming insulating paste as described herein expanded vinyls are easily repaired the use of a film forming insulating paste is particularly advantageous.