John
Although I haven't used Fabric Restorer for many years, I do use Nitrile gloves.
I never had a problem with Fab Rest anyway.
The gloves I have at present are branded UCI Nitrile RNF15 and are claimed to be effective against:
Petroleum related products
Animal fats
Solvents and alkalis
One supplier I used in the past sold me some blue Vileda Multipurpose gloves. They were NOT Nitrile, totally unsuitable and I had the same trouble that you are experiencing. The similar in appearance Vileda Nitrile's are a heavier, thicker glove and perform well.
Hope this helps
SAFE and happy cleaning

Ken