The Tamyia top coat gives the best overall look of painted metal IMO.
A little suggestion, before applying decals and the top coat, lightly and I mean LIGHTLY sand the whole plane with a 1600 grit sand paper or polishing paper, it takes away the roughness of the matt paint and makes the paint smooth, then apply the decals and top coat.
http://www.sisweb.com/micromesh/
Great Me-110 by the way!!!
Oh that's it, I'm hooked again, this weekend I'm finishing off my Fw-190D