Fixing a Mashuach sefer Torah
Above are some photographs of a sefer Torah I have been called in to repair from time to time. It as a sefer written on klaf mashuach, coated parchment. Over the past few years I have noticed fresh problems and cracking, occurring more frequently, to the point that there are currently several amudim that look like the pictures above. I have never previously agreed to undertake a comprehensive repair a mashuach torah scroll, because that nature of it is very difficult to work with (ink runs off the coating) and because of the coating, there is no guarantee how quickly letters will continue to crack. Once it starts, it doesn't stop, and it would be very difficult to guarantee continued Kashrus.
I have recommended to the owners that it is beyond my scope and capabilities to work with such a sefer. Furthermore, all of my usual repairers that I outsource to in Israel, won't touch klaf moshuach seforim. Does anyone know of a reliable repairer of klaf mashuach? Perhaps someone who knows a method of ensuring the letters don't continue to crack? I would like to be able to do something to help the owners of the sefer.
I have also heard of someone that puts a coating of some sort of laquer on top of the ksav to make sure it doesn't crack. I am not talking about fixative as that would likely be useless on mashuach. Can anyone shed any light on this please?