Try this Evirotex sealer (it's gloss but you will scuff it), I have sprayed it over decals and would suggest several light coats and you might want to test it on a sample to be sure of compatibility. I would still use the gloves to install the eyes and grommets etc and follow with Envirotex finish coat, I don't/haven't used system three yet so you might want to make sure it's compatable before risking a problem.
