Hi and welcome to the site Mauserman
The antenna - I'm not sure it's completely in scale, but it came from a broom. I was looking for something with a natural 'springiness' and thought of this... It is angled, but I felt it would look a bit more realistic...
Weathering. Sorry if this ends up a discourse...
1) Undercoat with Games Workshop 'Chaos Black' in spray - truly worth looking for, lovely flat deep black...
2) First color with Tamiya O.D.
3) light overspray with Vallejo (Air Color) O.D. lightened with a bit of yellow and light stone...
4) Overall general wash with oils - mixture of black lightened with Burn Umber .. Very thin consistency!!!!
5) First highlight mixture of (Vallejo) Green, Yellow and white using a square brush..
6) 'Pin wash' black/burnt umber (oils) round hatches, panels and rivets...
7) Second Highlight on rivet heads etc.... as before if a grade or two lighter...
Hope this answers your question....Welcome again, Jim