Prepping a new picture

Using a wide canvas (draw the design of the 2 gouramis

cut a outline of the gourami to cover the area where the fish will be so that the stencil being used doesn't go the area for the fish.

Using modeling paste apply on the stencil (hold in place with tape)

and spread the paste over the stencil (with the mask of the gourami below), remove carefully (clean stencil between uses) & flip the stencil over a few times to cover the entire canvas .

Then let dry