bobw posted an excellent image of
Buck Rogers with the 1940 Portsmouth Cubs. I do mostly my own hand processed colorizations but have dabbled with using programs that automatically colorize images such as the one keonleafs
shared a while ago. Unfortunately, that site no longer processes images for colorizations. I have been using
another as of late. It is hit or miss and is best used as a starting point but on occasion generates a pretty nice finished product.