I use rope coat, a rope marking/ coating paint
Red, yellow, blue, green. UV things in it, water
soluble until dry then it's there to stay babe. Approx. US$30 litre (don't know what this is in that funny
old imperial system). Available from ???? No idea over there sorry. Ours comes out of Aussie.
Go with the fabric
paint comment above, probably the easiest and don't get Red if you have twitchy eyes. Red is the 1st colour to disappear in the water
. Get one that stays on polyester and nylons, not all do.