Varnish Cleaner & Polish by The String Zone available to purchase here: https://www.thestringzone.co.uk/the-string-zone-varnish-cleaner-and-polish
Developed in our workshop and used for many years. Thoroughly tested on varnishes of all types and age. We are pleased to offer this cleaner to our customers confident that it will delight any player who wants their valued instrument to look its best. This polish is particularly effective in cleaning older instruments.
Our complete Instrument & String Care page (including cloths, peg paste): https://www.thestringzone.co.uk/categories/clean-polish