I just found some construction paper that matched as close in color to the ST badges and taped it on the back before I attached the double sided tape that was included.
In lieu of the colored paper I also had plenty of old magazines and flyers that could have worked with lots of clear red but that would have required a few more scissor cuts to do each letter.
Given the darker location of the footwell under the dash, I don't know how visible this will be and it may not show off particularly well, but I know its there and I think it looks good, which is all that counts.