Powder Coat will more than likely cover stamping, depends how thick it is put on.
Re Chrome will cover stamping a bit and normally make stamping look a bit bubbly, depends how much polishing they do before chrome.
Spraying you can normally see stamping.
If it is a restored bike I accept that it will not normally look factory finish.
![Smiley :)](http://www.radbmx.co.uk/forum/Smileys/smilies/smiley.gif)