Teak oil is commonly used to finish outdoor furniture because it waterproofs it. It is also used on indoor furniture in high- humidity climates, to keep it from warping. It is durable and does its job well in keeping the wood sealed and protected from the elements. But removing teak oil is not so simple. Because of its durability, it does pose some challenges, as does removing any other type of finish from furniture. But don't despair, it can be done.
Wash the furniture down so that it is free from any dirt or grime. Allow it to dry completely.
Apply the wood finish stripper to the furniture according to packaging instructions. There are many different brands and types of strippers on the market, some you spray on and some you brush on. They also come in liquid form and gel form. Allow the stripper to sit according to instructions.
Scrape off all teak finish that has peeled or bubbled by using a paint scraper. After all the finish that can be scraped off has been removed, let the furniture dry for approximately two hours (in 72-degree weather; longer if it is colder). The stripper dampens the wood and you want it completely dry before moving on to the next step.
Sand down the furniture using a 150-grit sandpaper (always sand in the direction of the wood). This will lift any loose parts of finish that are left behind. For corners and grooves that the sander will not reach, the finish will have to be removed by hand using the same grit of sandpaper.
Go over the furniture using a softer grit of sandpaper, such as a 220-grit. This will remove any scratches that the 150-grit left behind. Wipe the furniture clean by using a tack cloth; this will remove all sawdust.