It depends on the machine and what state it was is before. Sometimes they are so destroyed that once they are presentable there isnt much of an argument of originality left, so then i usually just over restore it..which looks great but new out of the box. I prefer to just touch up or leave cabinets when possible because I really like that they have had a life and history...it gives them character, just like people. It doesnt really answer the question but its how i decide whats worth doing.