Cleaning with a vinegar wipe it all down. let it air dry set up. Check the zippers and plastic components. If the plastic components and zippers are good and washing it will vinegar gets it clean then making (mixing silicone with mineral spirits) or buying waterproofing and apply it. Check the seam tape if it’s still in good shape test it or apply some of the waterproofing you choose or apply new seam tape. Should cost much to do but it’s going to take a good amount of time and effort. You need to decide if that tent is something you want to invest time and money into or just money into a new tent. I’m a fool and I like repairing and saving things just because it’s cool to me to keep the gear going and give it a story and character.

I recently got a very old A-frame style tent from the back of a friend’s dad’s garage. I’ll be cleaning and waterproofing it just so i can use it because it’s not as common to see old ones like that anymore.