Taylor,
I build my boats exactly in the same manner in which you are atempting, however I use Honduran or Peruvian Mahogany. I do not know the differences between those and your Phillipine boards. Firstly it is very important to choose the right board which has grain running straight and flat the length of the board with no run out. Cut the strips very thin (1/8 in)and use multiple layers around the cockpit. I can use up to ten laminations to get it thick enough for the lip. This way you should not need to steam at all. Using epoxy as glue, I let the thin strip soak up lots of resin, and bend around the coaming riser with starting in the middle and working toward bow and stern I use lots of clamps clamps so as not to allow the wood to break or splinter away. I do not use a seperate form, but use the actual boat as its own form. Use wax paper so that the lip does not stick. I make two halves, cut on center line and shape and then glue to riser with epoxy. Left overnight, the lamination is as solid as a rock and guaranteed it will fit on your boat since you used the boat as the form.
Once done, the wooden coaming and lip is exquisite.
Good luck.