Lovely bags and they both look to be in great condition!
The black bag would probably darken and look a lot better if you applied some leather conditioner. If it's dirty you could wipe it down with soapy water first (just a little blue Dawn dish soap in water) and then wipe with a clean cloth and water.
After the bag dries you should apply some leather conditioner; Leather CPR conditioner (Dollar Store or
Amazon) is a favorite product among many rehabbers. Just wipe it on, rub it in, clean off the excess and let the bag rest for awhile. If it still looks a bit faded after conditioning, then you might try applying Black Rocks Leather 'n Rich (
Amazon) apply it sparingly and wipe off the excess. After the bag has time to absorb the BRs, buff the bag with a soft cloth or a soft horsehair brush. You can brighten up the brass hardware with some metal polish.
I've cleaned several canvas and cloth bags and I've found that dunking the bag in Dawn and water, followed by dunking it in clean water, then letting it drain, before stuffing it with towels to shape it while it dries usually works well. However, I have had one of two experiences when some of the glue near the leather or seamed area darkened after dunking to cause slight discoloration, but if you are thinking of trashing the bag then I would suggest that you give it a try. The bag that I am thinking of that got darkend near the seams was nylon, not canvas.
Below are before and after pictures of a canvas and leather Coach bag that I once rehabbed. It was very dirty and stained and I really tortured that little bag, I even ran it through the washer, but it came out really good IMO:
And dont let Lady McBeth have any more red wine, either! I recently picked up a canvas and leather Coach bag at the Salvation Army Thrift Store for $12. The bag was filthy and badly stained with ink, dirt, food, and some really nasty red wine stains under the flap. I wasnt sure if it could...
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Perhaps some of the other rehabbers can offer other suggestions, good luck! Whatever you do, please don't trash them, you can donate the bags to a charitable thrift store so that they can sell them and other rehabbers can try to give them a new life!