I had a similar problem on my teak garden furniture and used a an antibacterial handwash, hot water and a sponge cloth. All the spots disappeared after a few washes. Rang this garden furniture site and they gave me the information.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local