I needed to make a two color decal for one of the drummers in my band. The best way to layer two different colors of vinyl is to use a light table. I don't have a light table, but I do have a glass-topped picnic table in my back yard. Here is a step by step tutorial that shows how I did it.
also on my blog:
Here are the two layers of vinyl. The silver layer has been covered with transfer tape, and will be our top layer. The burgundy layer will serve as an outline for the silver letters.
This is the same vinyl used at sign shops everywhere. Check out the signage page on my website for resources.
lay both pieces on the table face down.
now the silver layer should be on the bottom, burgundy on top.
Tape the silver layer to the table.
One thing I forgot: the sun has to be out for this to work.
Look under the table, slide the burgundy layer around until it lines up with the silver layer. Then place a weight of some kind on top to keep it in place.
Tape the burgundy layer in place to the silver layer. You may need to trim away some backing paper.
view from under the table of both layers aligned.
Flip the whole assembly over. Pull back the transfer tape from one corner.
Cut off the backing paper at abround the halfway point.
The view just before merging the two layers.
Burnish the silver layer down firmly to the burgundy.
repeat for other side. Postion decal into place on the drumhead,
and tape it into place. Remove backing paper one side at a time as
in previous steps. Burnish decal firmly onto drumhead, and finally remove transfer tape.
aslo see my slideshow on Fotki