chicoman;
Throw out the green stuff! Well actually hang on to it for ground work but keep it well clear of fresh paint.
I use a piece of board that has been drilled in various places to accept different size of holders. Whether it is a piece of wood dowel, toothpick or a very fine sewing needle. This way I can re-use my holders and I don't have to look for new ones with each project. My parts holders are always in their respective holes waiting for new parts to be tacked on and painting to begin.
Try it out, it works quite well.
Cheers;
Gregory