With a total investment of less than $200 and one of the plainest finishes of any firearm ever, the prospect of repainting/finishing your Hi-Point carbine sounds like a great weekend project.
Before getting started on any refinishing job on your carbine, be sure to completely unload and check your firearm for any brass or ammo. These should be nowhere around while you are working. Clean, degrease, and de-oil the gun as much as possible to prevent adhesion issues. This prep work is the most important part of the process. Some recommend giving the surfaces a good wipe down with rubbing alcohol and letting it dry to get any unseen dirt and grime off. Be sure to tape off any opening that you don't want paint to creep into.
No matter what, avoid having any paint or coating overspray into your inner workings of the gun. Let any paint or coating dry thoroughly (think in terms of days rather than hours) before reassembling, lubricating, and firing the carbine again or you will just have a mess on your hands.
As reported in our forums, Krylon Camouflage paint and similar items. This type of Krylon is different from your standard 88-cent variety of Wally World special. Still it produces good results and can just be sprayed on right from the can. Overall the project can cost as little as $20 and with multiple colors, custom camo jobs can be pulled off. Through the strategic use of leaves, grass, masking tape, and other items around the house, almost any pattern can be worked in as long as you have the time and imagination.
(Painted HPCs, hattip JeffGun)
Similar products, like Rustoleum Appliance Epoxy paint, ceramic engine spray-paint, and others, can get the job done as well. Just stay away from the really cheap spray paints as they will chip, crackle, and rub off very shortly. A flat exterior clear coat applied after the paint has dried can provide long life for these inexpensive finishes.
Duracoated hipoints, hat-tip LarryK
This is a custom firearms coating from Lauer Weaponry. It can be applied by anyone with an airbrush gun and the will to do the work. The neat thing about Duracoat is that it is extremely hardwearing if applied properly. It's a coating, not paint, and has to have time to cure properly but once it does, it's good to go. It will last several times longer than any paint and the company states that any firearm properly coated with Duracoat simply will not rust...ever. With a claim like that, how can you go wrong? They have recently even introduced a 'Shake n Spray' kit for $35 that you don't have to have an airbrush for.
Other finishes, like Cerakote, have to be applied and oven baked on which often means finding a local gunsmith to handle the job
No matter how you roll, odds are your customized Hi-Point carbine is only a weekend away.