Also, you would like to put ディ (small ィ, not a big one) instead of just デ if you want it to sound as Andy.
As mentioned, it doesnt really work against light BGs and against dark ones the outline looks jagged. Anyway, ideally you should make sure that it works on different BGs (unless you use a fixed one), so you dont have to make the logo loads of times as you change your site.
For making metal more realistic I wouldnt use tones that are that close together, maybe change the brown to something darker, and maybe some flesh-ish tone as an additional reflexion. Either way you could google for metal pipe or flat gold (or something like that) images and use those as references. (You could just find a ref, and squint your eyes to simplify the shadows, and base it on what you see)
Good luck with further edits