I can't see why that wouldn't work. My girlfriend did something similar
to make a crazy quilt jacket. She took a large piece of cotton material
that she would like for the lining of her jacket and sewed randomly
shaped pieces of material all over it, then used her Janome 6500 to
stitch various decorative stitches around the patches and added
embellishments.

She layed the material face down on a table and placed her jacket
pattern on the top and cut them out. When she sewed the parts together,
she had a beautiful, easily made jacket.

Just remember that if you're using fairly thin materials for top and
bottom, some of the stitches, like zigzags, will "tunnel" if there isn't
a stiff enough stabilizer under the stitching. In a couple of places my
friend placed a thin stabilizer between the two materials before
stitching.

Denise