Trouble removing Cabot's Aquadeck

Hi all,
I am wanting to clean up and recoat my merbau deck and I am having trouble removing the original Cabot's Aquadeck finish that is on there. I pressure washed it then applied napisan and scrubbed with deck brush, then followed it up with another good pressure wash and there is still alot of the old finish still there. I am planning on refinnishing with Feast & Watson's, but I'm assuming that I need to completely remove any signs of the aquadeck first. I am hesitant in sanding it back as it is fixed with dome head nails :(. Searching through the forums I see oxalic acid mentioned. Would this be the answer? Where would I purchase this? Any help/advice greatly appreciated.

:cheers2:

Adam:;


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