Have had issues for years with mould on lines / ropes, especially on the ends. Synthetic ropes it isn't really an issue other then being ugly, but I am a minimalist / naturalist and choose not to go synthetic. Finally found a solution that works in treating the lines with Birch tar, no more mould issues! Also winter storage and mice.... little buggers get in and chew on the ropes, Birch tar also deters them and I no longer have issues with them.
Just thought may help out a few people here in the same boat. It is very hard to find online but if you have birch trees in your area you can make some with a little time and effort. Also works very well as a waterproofer and protectant against salt water (leather and wood).
Get a paint can from a local autobody store. Poke a small hole in the lid, stuff as much birchbark as you can in it and put a larger hole in the bottom. Dig a hole in the firepit large enough for a small can, like you would get from a can of peas. Put a small can in the hole and sit paint can on top, fill in with dirt. Get a nice hot fire around the can and roast it good for about 1 hour, let the fire burn out and you will have some birch tar in the bottom can.
Just thought may help out a few people here in the same boat. It is very hard to find online but if you have birch trees in your area you can make some with a little time and effort. Also works very well as a waterproofer and protectant against salt water (leather and wood).
Get a paint can from a local autobody store. Poke a small hole in the lid, stuff as much birchbark as you can in it and put a larger hole in the bottom. Dig a hole in the firepit large enough for a small can, like you would get from a can of peas. Put a small can in the hole and sit paint can on top, fill in with dirt. Get a nice hot fire around the can and roast it good for about 1 hour, let the fire burn out and you will have some birch tar in the bottom can.