In my experience of teak, i make furniture from recycled timber so only
use 'recycled' it is very prone to splinter as it has very long cells
in its makeup. The roughness is due to rainwater raising the grain. If
you use some silicon carbide abrasive that should cure it. p.s.
Indonesia also uses Malaysia as a launderette for its timber exports.
Anyway why not use a native timber oak, chestnut etc. Then the tropical
forest can be left. Do not encourage B + Q.