What is one looking to gain by applying oil under a laquer or poly, as opposed to a stain first or even just applying the laquer or poly directly to the wood surface? Essentially, what does oil bring to the situation?
Thanks for all your comments - I should have mentioned I am finishing curly maple and used the oil to make the grain really stand out. It is a complex piece and spraying would make life much easier.
Thanks for the tip (should have thought of it myself) for testing on scrap.
What is one looking to gain by applying oil under a laquer or poly, as opposed to a stain first or even just applying the laquer or poly directly to the wood surface? Essentially, what does oil bring to the situation?
An oil will give wood grain a deeper more 3D look. A laquer or poly finish sets up on the surface before it has time to penetrate. By using an oil then a laquer/poly, you get the grain poping effect of the oil combined with the durability of a film forming finish. The key is to let the oil dry completely, at minimum a week, before applying your desired finish.