I painted mine and then sanded down so that it was sealed and glassy.

Pretty much. Spray paint is still going to leave some texture and imperfections. After doing the final coat I block sanded with 220 and then used a tack cloth to get any sanding residue up before laying down the decals. I did my decals wet so having the wood sealed was important as I didn't want to raise the grain.

after final coat and sanding with 220IMG_4051.jpg

tack clothIMG_4064.jpg

positioning and weighting to keep in placeIMG_4065.jpg

after decal was installed i used a sanding block to "cut" the decal and give it a bevel instead of a razor knifeIMG_4054.jpgIMG_4057.jpg

hit up edge with paint pen. I'd do a search to see if there is a painter's pen that matches your color. I found a semi-gloss one that matched mine pretty well. IMG_4059.jpg

doneIMG_4068.JPG

Bryan is spot on.

I used the HD mix and rolled my cabinet. After rolling I sanded it and then sprayed a clear finish and sanded that until flat and then sprayed a final coat of semi-gloss ploycrylic. The match to my decals was closer than the rattle can. Personally if do the whole head and not worry about the screen until you can get one to use. I'm surprised no one around you has one.