Ever had recurring problems with chain produced specially for model boats, especially where lengths of anchor chain hangs in a loop over the bows? The issue is that this type of chain is usually soft brass, and only pinched closed where the next link can 'pull'. Result is it keeps breaking and can be darned difficult to repair in situ.
Solution: Google stainless steel chain under jewellery. Comes in 2, 3, 4, 5, and 6 mm link sizes, regular link shape, and in various lengths all for a similar price to chain bought through a model boat supplier. It does require painting but is incredibly strong due to the requirements of its use as jewellery.
Problem sorted