Trewax has high percentage of carnuba, combined with more easily buffed waxes, that give really good fill and film toughness, yet is relatively one of the more durable waxes commercially available.
Also available in dark brown and Indian Sand [burnt sienna range]. The clear seems to be the most durable, but the other two are invaluble for applying shading on the final effect over the finish of restorations.
In general, high grade, hard paste waxes provide the most utility and value vs the liquid and soft waxes. Also, be careful of using liquid or semi-liquid wax that are marketed in 'colors' : walnut, oak, maple, mahogany, etc. They are fine for tarting up inexpensive antique furniure for quicker turnovers. Also, never used on the really good pieces, by the top end dealers.
You see, the heavy dye content in them can strike thru gaps in a degraded finish and leave permanant and unsightly stains in the unprotected portion of the wood. As with 'everything finishes', treatments must examined with respect to cost, expectations, goals, and long term effect on the object.
For the performance, relative cost, and lack of potential harm Trewax clear is right up among the top contenders, as a renewable sacrificial coat on metal and wood.