I only do English and German, but found a Polish website where they're using the Starwax product you refer to on gunstocks, so it should be OK.
Curiously, when looking for that there is a Japanese hip-hop/gangsta label named Starwax; Japanese Gangsta Hip-Hop is PRETTY silly.....
http://www.youtube.com/watch?v=zbzVQYH3X08
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