Why yes you can...
Basically all you have to do is put your armor on and troop... (psst... make sure a garrison mate see you and get phicture)
Then your CO / GML will check a little check box and vala your active again!
Kris
Depending on the humidity and temp. where you are you can typically re-coat in 6 hours, I have done it in as little as 2-3 hours when the weather has been warm.
You should be able to touch and handle it at the 6 hour mark. However the paint probably wont be fully cured for 24 - 48 hours so it may scuff if handled too roughly before then.
Kris
You could try mixing a bit of white latex paint or white pigment for latex paint with some of you molding latex. paint or slush it into the mold then pour the rest of the casting latex into fill the back. that way the color will be permanently bonded hand back and you shouldn't need to paint it at all. A friend of mine who does latex masks does something similar for the base color on his masks.
Also you could mix pigment and or latex paint with some of the casting latex and paint it on a finished casting.
Kris