I am getting close to completing Chris Schwartz's staked bed from the Anarchist's Design Book for my daughter. The stock is lumberyard SPF construction lumber. I'm wondering what good options are for an interior finish on softwoods like this?
A particular requirement is that it be very, very low VOC. We have some chemical sensitivities in the family and I'd hate to be giving her migraines when she sleeps in her new bed.
In the past, I've been content with hardware store Boiled Linseed Oil on small projects like stools and shop furniture, but I know now that there is lots more than Linseed oil in there. For low-touch completely indoor items, is no finish at all a safe choice for the wood? If not, are there oil or oil/wax combinations that are less odiferous?
My last concern is that this is a particularly large area so something that doesn't cost a fortune, nor take a toothpick or a week to apply would be nice.
Thanks in advance for any suggestions you can offer.