Hot rodders use metalflake...school kids use glitter. j/k bro. If you can use a spray gun, you can shoot flakes. I did quite a few kustom bikes and guitars in metalflake and it's just another step. I use lacquer for it's fast dry and ease of building up all the coats fast. Primer, sand, sealer, sliver base (lacquer) let that flash dry, mix a pot of clear lacquer and dump in your flakes (real big flakes (glitter sized) need a big tip 2.0) and shoot. I use House of Kolor flakes and pearls...good quality stuff. Do as many coats as needed to fill in any gaps, again let each coat flash dry a few minutes...NO sanding. Since you're not shooting any kandy color, you're ready to clear. You can use lacquer, but it takes a LOT to cover up the metalflake texture. I prefer to use polyurethane...it's catalysed so it dries hard and fast. There is a lot of clear needed to bury the flakes, but it looks deep and thick. I go about 4-5 coats. After it's dried completely, sand with 1200, 1500, 2000 and buff.
Have a look at my album for some pics, the 2nd page shows 2 metalflaked Teles...good luck.
Metalflakes and more...