We can't even buy oil based here in CA. Too toxic.

I am partial to Rusty Empire's suggestion as well.

So much better for long term maintenance too. With poly if there's damage you have to refinish, period. With hard wax you can spot finish by sanding out and blending in the area in question with your chosen brand. And tho the cost per gallon is greater you need much less of the product compared to poly. And none of that artificial plasticy coating poly gives you.

Hi Rusty, is hard wax oil a new(ish) technology ?

Today, unfortunately, I noticed after 3 years, my hardwood maple floor is "discolored" at places covered up -- I wish the floor people (somebody!) had warned me about this. Preventable (work, but preventable). Sigh. (poly, oil, I think)

My bad about Bona not being available in NA. Ultimate can speak on this topic with much greater depth than little old me, but I understand that it has been used in the UK/European market longer than us in North America. Here's an educational blurb covering the basics for your reading pleasure.

http://www.heidelbergflooring.com/hard-wax-oil-finished-wood-flooring

This is an excellent article comparing some popular brands worth bookmarking too (Naperville Hardwood has a few good reads on their site).

http://napervillehardwood.com/blog/the-hardwax-oil-experiment-the-winner/

http://napervillehardwood.com/blog/sunlight-and-fading-hardwood-floors/

Another resource about the topic

https://woodwhiz.com/oil-based-polyurethanes-for-hardwood-floors