Hi, first post here. I wax for the cleanness and do credit card tours only. I use the cheapest paraffin wax (ard $5 for 2kg) without addictives and lasts up to 500km in dry weather (squealing chain noise as indicator); drops to 200km when it rains.

I bring a small bottle of make-up remover as chain lube as the main ingredient is paraffin oil. Easy to obtain in convenience store when needed. The make-up remover is very easily washed away with warm water and maybe some dish soap/detergen.

I find it's the best compromise between weight/volume vs to bring one more waxed chain. Definitely better if you're unlucky to have more than a full rainy day or two during the entire tour.