helps a great deal, don't know if i have the modelling painting skills for this but for sure can give it a chacne.
Modelling. Take your time, & every so often hold it at arm's length. That is, at least, how far it
will be seen on table. The phrase to remember is,
'A blind man on a galloping horse wouldn't notice it'
Painting. 1) Paint the flag white, leave it to dry (at least overnight)
2) Get some Gel pens & DRAW some bits of the flag that show.
e.g. If it is in a Union army & has a few red & white bars with a bit
of the blue canton showing, people will assume it is 'Old Glory'.