Yes

One tip: To reuse the soldered end of a pipe that was in a fitting, reheat with a torch to melt the solder and wipe the wet solder off with a dry rag. Once cool you can flux and reassemble with new fittings and solder.

Thanks much -- that's what I was hoping to hear. It'll be easier (and will look better I think) than cutting the pipes back and using couplers to extend them again. I succeeded in doing it with some scrap pieces that will never see water, but wasn't sure -- before now -- that it was a good idea for real thing.

jonnyp, I don't think he's reusing the fittings. He said he wanted to install new fittings. I think he was asking if he could pull the fitting off, clean up the pipe and put new fittings on the existing pipe. At least that's what I understood.
Funny, I had a friend in the plumbing business who had 4 men working for him. They used to bring back the used copper fittings, 1", 1 1/2", 2" and 3" and keep them in a box. When they had nothing to do he would have them clean them up to reuse. They would clean the inside and polish the outside with a wire wheel. I guess it saved a few bucks. Of course with the price of copper today it might be worth cleaning up 1/2" stuff :-))

coolvt, I stand corrected. Still you are better off going back to clean copper and adding couplings. A little more work but we won't be revisiting the issue. As far as cleaning those larger fittings, absolutey from a business angle, especially when you have paid help doing nada. A product that is finally
becoming attractive, because of the cost of copper is PEX. It is not popular because it is so much easier for the DIY to use. Anyway it is Saturday, I'am going to have a few beers.