I just did mine today, maybe a little smaller but I used the exopy with fleck (Epoxy_master). I think its the way to go. Just mix a smaller batch in some disposbale cups.
New guy, great forum. I've gotten some great ideas. Was thinking of insulating my garage doors as I live in the NW hills of CT and our master bath is over the garage. The bathroom gets pretty cold in winter. I can't use the Owens corning kit as the wooden doors don't have "channels" to retain...