Protecting garden bed wood

[jacobisaac]

I am looking to make a garden bed and have bought Sienna treated wood after understanding that this is the best bet for a veggie patch. I would like to know more about enhancing the lifespan of the veggie patch timber. I understand that to preserve the wood from moisture / water wear and tear, its better to paint it. But will painting the wood contaminate the soil? Will beeswax help enhance the lifespan of the wood? As a newbie, looking forward to get some expert advice on this. Thanks.

[jacobisaac]

Yes. I gave two layer coating of Crommelins on all sides to get a even look.