This post will start a guide about restoring wood cabinets.
I will preface this guide by saying it is often cheaper to just buy a brand new CNCed cabinet from one of many sources. I'll post an assembly guide latter in the thread.
Commercial equipment continued to be painted with paint containing Lead well into the 2000s, so assume all cabinet paint is highly toxic. The 1978 ban on household Lead Paint did not apply to commercial equipment. Sanding should only be done OUTSIDE OF THE GARAGE and WITH A LEAD RATED RESPIRATOR, downwind from your garden. A "dust mask" is absolutely worthless. You will never be able to clean all the Lead out of a Garage or Basement if you sand there.
You are going to need one of these: