re: Teach a man to Fish (Fark Board Beginner Questions)

A question concerning photo touch-up. I've seen some great work on here related to that. A Hokie friend posted a real old and faded pic of his Dad beside a helicopter flown in viet Nam. He wasn't asking for photo help, we just had a thread on our pay board honoring those who have served this country! I saw the pic...very faded and purple-ish. I copied it and used Paintnet with the Hue/Saturation thingy and was able to take out most all of the purple.
My question is, was this the correct tool to use...here are the pics.





Again, he didn't ask for help, I just wanted to help out since there are so many things we can do with these programs like Gimp and Paintnet, etc.
Thanks again guys for teaching me the correct ways to do this!!