DC, on the base forms(styrofoam) I shape it with a serrated knife or sand paper. Once I have that basic shape I shape the tissue wet with watered down white glue like modeling clay then cover that with tissue paper to smooth it out. Sometimes I have to go back and shave off an area that doesn't look right, a hump, etc. then lay more tissue paper over that.
The bow is a piece of osage I chased a ring on(wish it was all that easy
) then thinned it down to that one ring, carved the back profile then with a candle I heated it to give it the bends in the right places. I'm going to sinew back the bow. The arrow on the bow now is a tooth pick but I will make arrows for it.