It appears from your close up pic that the clear-coat has been 'leveled', meaning the grain has been filled in. From your imagined pic the flakes appear very fine. As was mentioned, I have successfully 'dusted' finishes with various glitter products, most recently Montana rattle-cans. They are sold on-line but I buy mine locally at Blicks art store here in SF. I think what you wish to do is completely doable as Matt said and as long as you follow a few rules you'll be successful.
First, I would remove everything from the body. I would then tape off the neck pocket and control & pu cavities. Then I would use a brown Scotch pad (or a generic one found in a paint store) to dull the gloss evenly. It doesn't require much work - just needs to be consistently dulled. It will not 'scratch' the surface as long as you don't rub too hard. Once dulled, use alcohol to clean the surface of dust with a cotton cloth. With glitter-dusting you need to spray above the body laying flat letting the flakes settle on the body. The Montana spray is an acrylic lacquer and will not cause problems interfacing with the factory clear coat as long as you keep it minimal. As in, don't concern yourself with building up the clear vehicle - just focus on the flakes. It doesn't take much to get an acceptable result. Spray with sweeping motion about 6" above the body. It 'drys' instantly, so spray until you like the way it looks but don't overdue it. A warm sunny, wind-free day is best for quick drying/curing. Spraying the front side first*, also overlap the side but don't spray directly
at the sides. You just want a graduated amount of sparkles and you'll do the same when shooting the back side. That way there isn't a build up on the sides.
Once done - allow a few hrs (what's advised on the product) before clear coating. You actually could stop because of the gloss clear vehicle, or shoot satin clear if that's your preference. The tiny flakes minimally applied create a very minimal texture so if you want 'glass smooth' - that's another level of skill. Truthfully - it's so minimal it's nearly flat. With heavier 'flake' finishes, one needs to bury the flakes in clear so they are under the top, which is then leveled and buffed. I wouldn't advise taking that on unless you are well versed in doing so.
Be aware that the tiny flakes can float everywhere in the vicinity, so you need a windless area/situation to minimize over-spray. I use a large square of cardboard with a 'lazy-Susan'** as a spin-able base for the body. This way, you stand in one spot and slowly spin the body while spraying.
* because there are cavity interruptions, you can get the hang of application before shooting the uninterrupted backside.
** I bought mine years ago in a trift-store
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examples:
Montana Hologram glitter w/satin clear-coat. Note: this finish is deliberately textured incorporating a craquelure technique.
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This one is using gold "Glitter Blast" (found in HW stores) over orange. More concentrated coverage and a satin lacquer clear coat.
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A few more with "Glitter Blast" -
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