Water bourne urethanes tend to do funny things with walnut. It looks good until the finish begins to age. Then it lightens the floor.

So oil sealer is good idea. I normally do two coats oil and one water bourne coat.

Thanks,
Is the oil sealer the same step as the stain? Or is it a separate step:

1)
stain
oil coat
water coat

OR:

2) oil based stain
water coat

One person quoted us for one oil coat then 3 waterborne coats- that's too many water coats, right?

Another quoted us like you said- 2 oil then 1 water, but noted that it would be 2 weeks after the oil coat before the water coat could be put down. Is that correct?

As far as timing goes with when to put that water coat over oil. Thats when you will get differing opinions. I personally dont wait that long unless specified. But if that contractor feels more confident in waiting that long then so be it. No harm except you waiting the extra time before you get back to your normal life.

Thank you! You have been so helpful!

Note that Bona says to first put a coat of either stain or sealer, then 2 coats of poly (Bona Traffic). Don't listen to the guy who just puts poly without sealer.

We did a pine floor with walnut inlays and used sealer + 3 coats of Bona Traffic, just because we had extra and figured we might as well use it up. It's held up great.

Thanks Weedyacres-
The flooring specialist I think we are going to use says that he stays in the Bona Line.....and that he will use an oil based stain/sealer, then another layer of sealer (forgot the exact name) then 2 coats of the Traffic. He said he will do extra coat if we want at no extra cost. I am going to view his work of a walnut floor at a home nearby......and he is going to make up some samples for stain for me next week. He said he did one in Provencial stain (sp?).