Brazilian Cherry is a hard, dense wood with grain going from dark chocolate to honey-caramel. The end grain on the board from which these knobs were cut looks a bit like brown pin-stripe. All knobs have horizontal grain to enhance iridescence in the more visible tops.
Knobs 233, 234 & 235
These knobs were all sealed with SG, and finished with SG and KNSP. Acrylic paint, Flame Yellow on 233, Light Blue on 234, and Inca Gold on 235, was applied by finger to cut grooves in knobs as they rotated on a lathe, wiped or cut off the wood around the grooves, and sealed with SG.
A #1 centering drill with a 0.045″ tip spotted a hole in the (outer) groove on the top of each knob, then drilled about 0.07″ deep with a 0.092″ drill, to accept a glass bead pointer. SG fixed each bead in its hole. But these were filled to overflowing with SG, and then cut back down to the level of the top. This removed all specular reflections from the beads, and flattened their colors.
In the case of 234, the blue paint got into a number of small voids on the sides of the body. I cut the profile deeper to remove them.