Actually came here to suggest Stabbity's Crescent Rose scythe tutorial but it looks like she's got that covered!
As for the expanding foam, cover it in a layer, maybe two, of paper mache, then a layer of paper clay, and then sand it down to the right surface texture if there are any unsightly bumps. You can then paint over the paper clay!
Friday: Battle Bunny Riven (League of Legends)
Saturday: Satsuki Kiryuin (Kill La Kill)
Sunday: Lady Two (Drakengard 3)
Monday: Kraehe (Swan Lake variation) (Princess Tutu)
You can call me Meg.
I like RoosterTeeth, indie music and poetry, and American Spirit menthols.