WTF? Not that strong? If you make 4-5 layers of it, damn, IT'S JUST AS STRONG AS FIBREGLASS! I EVEN USE MY PAPER MACHED HELMET IN AIRSOFT/PAINTBALL!
Only did Paintball once, though, kindof ruined my cheap-ish paintjob :p
But you do lose SOME detail. But I wouldn't say it ruins your piece.