Flight Deck Decals Question

I always prime the deck before applying the gloss coating, but mostly it's because I spray it on. I think it's better to have a nice, even coverage than just overspray from the sides, etc. Also, if you want the decal to "pop", it's better to have a very light/white deck. A dark colored deck will mute the color of the decal.

Are you going with a resin model? The FDM material will be very bumpy and you'll want to follow the FDD instructions to make it as smooth as possible.

Good luck and post pics!

If you have a resin carrier, using the FDD decals is actually pretty simple...the hardest part is the cutting of the decal.  If you go conservative, you'll be constantly trimming more off...but I recommend this for your first one.  Cut...dry fit...trim...dry fit...trim...so you get a feel for how close to the line you should go.  Don't press too hard with your x-acto knife, or the blade will bend and your cut won't be as straight as you think.  

I haven't done FDM, but I had a really rough blemished flattop in resin and every bump shows through.  Once you get some clear gloss on it, it mellows out the bumps a little, but they still show.