Restoring Jarrah out door setting

[ear]

Hi
trying to restore a Jarrah out door setting - having a problem sanding back to bare timber as the surface is sticky and clogging sandpaper it appears the setting has been treated before. My question: is there a chemical that could remove the previous sticky oil to make sanding easier? or some other method?

[Ingin]

First, wash it down with warm water and detergent to get rid of the surface dirt, thentry turps on a rag, but test it first on an area out of sight. If the rag darkens in colour, you will be taking off the coating, probably outdoor furniture oil.