When cutting square holes in an enclosure to mount an HMI, what method do YOU use? I've tried Jigsaw, angle grinder with abrasive cut-off disc, plasma, etc. and all of them damage the surrounding paint in some way. Is there a "trick of the trade" to do it cleanly? My best results have been obtained using a jigsaw, cutting against duct tape applied to the panel. The duct tape is about 75% effective in preventing the expelled chips being ground against the paint by the jigsaw platen.