thanx for starting this thread.

so i bought some grips from rivbike and put those on my bike and shellaced them. i put about 5 to 6 coats on and it was fine for awhile. then after some time the shellac started to bubble and when those bubbled they would look like pimples and pop then it would leave a big hole in the shellac. i finally sanded down the grips and did the shellac over and it was fine for some time but now it has started again.

i attributed it to the heat and sun here in arizona, i even covered my bike and it did it again.
has this happened to anyone. ill probally sand them down again and recoat it another 5 or 6 times.