not only reflections... if we're talking about polished metal (like for a sword for example) then keep your highlights sharp...otherwise make them broad...
one thing about metal is that specular and diffuse color component are pretty much the same.. so make your blinn color slightly bluish and specular color also... you'll get that cold steel look if you carefullly tune reflections with these settings..
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Dominik Susmel | art director
www.vongestern.com | art company - Zagreb, Croatia