If you have a small repair like a crack ring to touch up it'll never look right.
The grain of wood is constantly changing so a large area is easier to blend in.
You'll need 3 or more colors of paint, applied in several layers. I have custom mixed colors needed using serveral little bottles of testors enamels.
The dominate lighter color goes on last. The lesser 2 darker colors, one in full cover then one in linear stripes of various widths. Add some artistic touches with a needle, ball point pen, dry brush, whatever works.
It's trial and error. A knot with lines radiating out and away in sort of an eyeball shape can look more natural than a lot of squiggley lines. Anything you do will require water sand and clearcoat finish on the entire wheel to get a matching consistant sheen.
Burlwood is easier to blend than linear grains. For that you just pounce around with no pattern. Same with vynil grain but it also has a depth to duplicate.
