I've done quite a few repairs on broken pieces. I find them in the stores and get them dirt cheap or buy them off the New Marketplace. I use them for my office as display pieces or sell them as damaged for a couple of bucks more then I paid for them. I also have a few in my own personal collection that I just can't get rid of because of personal reasons.

I have a set of water soluable felt tip pens(100 plus colors) for minor paint chip touchup and find Acrylic Paint by Delta or Liquitex to be the best for major touchup. Super glue and Hysol 151 Bonding Material is the best for major repairs like breaks of chips of plaster missing. I've even molded a new ventilator ball on several pieces by buying an assortment of wooden or plastic beads from a craft store and bonding it to the missing area with Hysol. Looks and works great and then all you have to do is paint touchup the area.

If you need more specific directions Bob, email me.