I used a light application of 'Montypresso', it's ok, but is a little more brown than the amber you might want. It certainly helps remove some of that Ibiza 'first day on the beach' studio tan feel from the maple: Bloody expensive though! https://www.montysguitars.com/products/montys-montypresso-relic-wax   Probably only really worth it if you're also going to use it for it's intended purpose: darkening pao ferro or light rosewood fingerboards as well. (Which it excels at).