I just finished a tank for a 67 Sportster this dude. He had the idea that the job would be a helluva lot more expensive, due to the fact that he was quoted almost 2x what I charged, mainly because the other cat was using alot of pre-mixed candy and some House Of Kolor base.
I have no gripe against H.O.K. paints, theyre ok if you have the bread to pay top dollar for what you can do with 1-shot enamel, thats been around for alot longer than H.O.K.
The only disadvantage Ive found with 1-shot vs. H>O>K> is in the even of running a clear; you HAVE to catalize it, or the clear will literally pull the 1-shot off the surface, leaving ripples and a total shit mess.
For Candy-ing 1-shot; I pulled these directions off the paints web site:
1. As always, when working with paints and reducers, wear sufficient hand and eye protection, and use a quality respirator when mixing or spraying 1 Shot products.
2. Start by mixing 1 Shot 4006 Super Gloss Tinting Clear and 1 Shot 6001 Low Temp Reducer, at approximately a 60:40 Clear to Reducer ratio, in a clean, wax and oil-free container suitable for mixing and/or storing paint. This mixture will be your base for your candy color After creating your candy color, you'll be able to recue further if needed, for spraying or airbrushing.
3. Being conservative, slowly and incrimentally add any 1 Shot Lettering Enamel or Pearlescent Enamel to your candy base. The amount of color you add will determine the transparency of the final mix, so don't add too much color, too quickly. Mix your candy color thoroughly. When choosing your color, consider that the vibrancy of the candy color will be dependent on the vibrancy of your color choice; so obviously reds, blues and yellows will work better than say, browns, gray or black. 1 Shot pearlescent colors will provide some extra "sparkle" to your candy colors, due to their fine pearl content.
4. An easy way to test for transparency or opacity in your mix, is to allow a drip to run off the end of your mixing stick onto a page of newspapaer. You should still be able to read the paper through a dime-sized drip of your mix.
5. As would be expected with a transparent, or "candy" color, the best way to achieve a consistant, uniform coat, would be to spray it, either through and airbrush or full sized jam or spray gun.
6. Inherant with transparent colors, is their ability to allow the background color, material or pattern to show through, so applying your candy over a previously painted metallic color (193L Silver and 109L Gold are excellent choices) , or a textured effect such as bagging, marbelizing or graining; will result in specatular, radiant effects. It's important to note that if you intend to spray your candy over any 1 Shot bases/undercoats, that you employ 10-15% 1 Shot 4007 Hardener to your base color, and allow it to dry prior to applying the candy color.