As woodieb8 says, it's best to buy the blades and spoons ready to paint. I usually buy white too as any color shows well over it. I have also purchased chartreuse for particular color schemes like perch, mustard, 5 of diamonds.
Most of the lure component suppliers have a lower price painted line or at least a lower polished line. The LPO H series blades do not have a clear coat and can be painted over with no work. There is no need to pay for the higher polished finish if you will painting them. The more polished finish is harder to get paint to stick to unless you scuff and/or use etching primer. Save yourself some money and buy the regular grade of blade or spoon. For LPO products, the 'premium' finish is the regular grade. The 'regal' finish is highly polished and difficult to get paint to stick too
https://www.lurepartsonline.com/Painted-Colorado-Blades
https://www.lurepartsonline.com/Painted-Willow-Blades
https://www.lurepartsonline.com/Premium-Finish-In-Line-Blades
https://www.lurepartsonline.com/Premium-Finish-Casting-Spoons