RE: Profile P-38 on FLOATS- HELP
Spray in the props can be diverted by gluing a small piece of tri-stock or 1/32 ply to the edges of the nose of the float. Balsa tri-stock is easiest in my experience. As the water splashes to the side it will hit the spray rail and be deflected down. This also helps initial lift of the nose of the float.
Normally with one engine and two floats you'd only need spray rails on the insides of the floats. Your (2)floats are aligned with the (2)motors so you'll want to use rails on both sides of the floats.