Have been using Fiebing's alcohol dyes for 50+ years , on figured wood. Get some test pieces of the wood you your working with , to establish the color wanted. Sand and polish the wood with sand paper and OOOO steel wool. No need to whisker the wood with water and a heat gun , as 90% alcohol is the level of alcohol Fiebings alco. dye contains. Plenty of water already in the basic alcohol , so don't add more water to the wood ,to heat and remove whiskers. If it is desired to accentuate the wood figure , get some Fiebing's black alcohol dye , and cut it with 90% rubbing alcohol , 50 / 50 by volume. Apply the 50% cut black dye first , and dry the wood with a hair dryer , or heat gun. Once the wood is dry , polish the wood , and de-whisker with 0000 steel wool. This step will highlight the figure , as in the curl in curly maple , for instance. Next , mix and try red, yellow , or orange dyes to the shade desired on the test wood. Once satisfied with the second color made by mixing the alcohol dyes , again apply it to the wood. Heat gun until the wood is dry , and 0000 steel wool , polish the wood. If the color needs adjusting , now is when to do it. add another color, or use straight 90% alcohol to lighten the shading, if desired.
It took a lot of experimentation to learn to work with alcohol dyes. How this process came to me ,was mixing colored inks , used in printing press printing. I don't like chemical agents for shading wood , as there is little control of the colors created by chemical reagents. Yea , some old time gunsmiths used it , but I assume they liked basically black gunstock wood. I've been to too many m/l gun museums , and seen many non-totally black gunstocks , with beautiful color enhancements. This knowledge was about all I got from a 1965 University Industrial Arts class. Guess I got something , for the $1000 tuition , I spent back then. .............oldwood