Can't help with either the arrows or propellors (can't find my Datafile, if I remember correctly there were propeller drawings with brands in there), but if the Roden decals are of the "glossy" type they might be usable. I usually put a drop of clear gloss paint underneath and put the decal over that to prevent silvering. I've been able to at least use this type, unlike the flat coated ones, which are rubbish. These fall apart as soon as they come even near water...
Jeroen