Oh, and be careful wiping down ipe with a lighter wood on the riser or tips. The ipe "bleeds" with your wiping solvent, and if you wipe from the ipe onto the lighter wood, you will probably get some orange/brown staining of the lighter wood. Carefully wipe from the lighter wood to the ipe and it seems to be fine.
Although it doesn't seem to matter much with bamboo which doesn't like to take stain anyhow, at least if it's not end grain.
Dave