I've put a lot of dry transfers on decal film, both for lettering cars using CDS sets, and "bits and pieces" for end reporting marks, etc. like Peteski, I don't seal them until the final clear coat.
Many of my small DTs are on the edges of decal sheets. MS won't work, as they only put film under the images, but most others have blank film around the edges, and small lettering fits nicely there. No point chopping up a big sheet when one only needs a small bit.