Well, care no more, because Daimao from Facepunch has been working on a new fix which improves the textures, faulty lightwarps, and more!

Edit: Don't download, Valve will be adding this fix officially next week
• Improved painting on the following all-class hats: Ghastly Gibus, Ghastlier Gibus, Spine-Chilling Skull, Voodoo Juju, Wiki Cap, Bill’s Hat.
• Improved painting on the following Scout-specific hats: Batter’s Helmet, Troublemaker’s Tossle Cap, Bonk Helmet, Ye Olde Baker Boy, Whoopee Cap, Bombing Run.
• Improved painting on the following Soldier-specific hats: Soldier’s Stash, Tyrant’s Helm, Stout Shako.
• Improved painting on the following Pyro-specific hats: Brigade Helm, Respectless Rubber Glove, Vintage Merryweather, Handyman’s Handle, Napper’s Respite.
• Improved painting on the following Demoman-specific hats: Demoman’s Fro, Glengarry Bonnet, Scotsman’s Stove Pipe, Hustler’s Hallmark, Tippler’s Tricorne, Carouser’s Capotain, Rimmed Raincatcher.
• Improved painting on the following Heavy-specific hats: Football Helmet, Officer’s Ushanka, Tough Guy’s Toque, Hound Dog, Heavy Duty Rag.
• Improved painting on the following Engineer-specific hats: Texas Ten Gallon.
• Improved painting on the following Medic-specific hats: Prussian Pickelhaube, Vintage Tyrolean, Gentleman’s Gatsby.
• Improved painting on the following Sniper-specific hats: Master’s Yellow Belt.
• Improved painting on the following Spy-specific hats: Fancy Fedora, Backbiter’s Billycock, Magistrate’s Mullet.
• Restored the Frenchman’s Beret’s color scheme and phong mask.
• Improved the Carouser’s Capotain’s original model.
• Improved the Handyman’s Handle’s original model and texture.
• Fixed issues with the Scotsman’s Skullcutter’s smoothing and the Vita-saw’s smoothing.
• Made the following items paintable: Sergeant’s Drill Hat, Pyro’s Beanie, Whiskered Gentleman, Safe’n’Sound, Trophy Belt, Frenchman’s Beret, Camera Beard, Max’s Severed Head, Alien Swarm Parasite