Recently I bought silver and gold permanent marker and I tried out both on black paper. 
I really like how silver doodle looks because marker is more opaque compared to gold one. Gold doodle drawing has yellowish note which I don’t like, but I’m very satisfied with composition. Also, black ink over gold marker turned to dark grey… 

I really enjoyed the class and will continue to upload finished drawings. I have ton of metallic, neon and glitter gel pens waiting to be tried out :)