I am trying to mend a hundred year old christening gown. There are holes in part of the sleeve. The fabric is so delicate that even putting a needle in it causes problems. I have tried mending it by hand with a wash away embroidery backing fabric. I have tried to do it by machine as well. Nothing works. I don’t want to replace the sleeve. Any ideas would be welcome. So far I have made the holes bigger and it looks worse. I just hate to take away the integrity of the gown.