first i would like to commend you for keeping your not so skilled graffiti confined to your backyard...because of this you will avoid numerous beefs, run ins with the police, and a host of other problems that come with the game.... i wish a would have thought of that
heres a few tips....when painting a board of that magnitude try just painting one good solid letter...filled in...... outlined......3-Ded...and force-fielded
now lets talk about the caps.....since your using rusto the only two caps you should need is a rusto fat and a banana skinny. keep the rusto fats for larger surfaces (i.e.) dont use rusto fats on that board use the banana skinny for the whole thing
http://www.youtube.com/watch?v=HVjbz6z0LGQ
http://www.youtube.com/watch?v=RwwhmLBI1Ag