Haha, that's exactly what I did! And I needed to grind down one side of the washers to do it.. all because my LBS said they don't make chainring bolts any smaller than what I had. So all that fit at my LHS (local hardware store) were nickle-plated ones and now they're rusting because I ground them down.

So really, get a bunch of nice short-stack bolts (made out of steel if you're really classy), paint 'em whatever you want.. and apply liberally. One can never have enough single-purpose bolts.