I scan my photos then put them in my photo program and recolor them. But do you remember back then is when the so called 'magnetic' photo albums came into being? Since then I've taken all the photos, out of my 55 albums and put them in those photo/video boxes (down to 18 of those and easier to put on the shelf). Practically all the photos in those horrid magnetic things, are discolored, some even with lines. In the late 70's, I started buying 3 ring binders and the inserts that held 3x5's (my choice of size as they fit in envelopes). Photos from then forward are fine.
Have done numerous slide shows for birthday and anniversary events, and the photos in the flash drives look good.
It's fun to redo the ones from the 70's, most are quite presentable except for the lines. Good luck.