Re: Boring the cylinders on a 954
PM silverbullet, he's a site sponsor or he may chime in in here. Not sure about glazing but deglazing is accomplished by honing and crosshatching the cylinder bore.
And since I don't know for sure I will again direct you to a reputable sponsor such as silverbullet but I think the cylinders have a surface hardness treatment coating on them that has to be reapplied after machine work is done and if I remeber correctly yes .25mm is all the bore increase you can get.....
Erion racing had a bunch of .25mm over 954 race pistons last time I was looking at their site.