Hi! I'm relatively new to this forum although i've been stalking it for quite awhile already. I've been recently bitten by the vintage coach bug and been envious of all the impressive rehabs i've seen in this thread.

i recently got these 2 coach legacy zips this weekend (both authenticated by hyacinth) and 1 vintage coach basic bag. I would like to ask for your expert opinions and I have a few questions:
1. When do you decide to dunk or give a bath to a vintage coach bag? The black bag is relatively clean both in and out and the leather in my opinion is not really dry but the bag has creases on the leather making it lose its shape. I'm currently stuffing it with a towel to support its shape but i'm having a hard time deciding if the dunk will be good for it or just conditioning it will do. (The picture attached will show that it is standing on its own because i stuffed it with fillers inside)
2. The same with the dark brown small legacy zip. Over all the bag is okay with a few light (color loss) areas on the edges but the leather on the bag body i believe is not dry. Should i dunk this or just put leather conditioner?
3. If i put leather conditioner first and decide to dunk the bags later, will it be okay or will it forfeit the dunk rendering it not as effective as dunking it with out the conditioner?
4. My vintage coach cream colored basic bag is also clean inside and out with a few pen parks inside which doesn't worry me. I'm okay to leave it at that. What worries me are the faint stains on one side of the bag. Im guessing that these are color transfers from another bag but It's not that obvious. I'm hesitant to dunk it because of the light color. Is there something i can do with this like cover this with the acrylic+conditioner solution or would you just leave this alone?
Sorry if the post is long but i'm really hoping somebody can help me before i do anything to damage these beautiful finds.

i have attached pictures for reference. thank you so much for taking time to read this in advance!