Hi John
I did this kit with scandinavian oil.
https://www.buildyourownguitar.com.a...t=11585&page=2
I didn't use any sealer on it, just layered on multiple coats.
It tend to eventually reach more of a satin finish rather than gloss, that's the nature of the oil. I polished it with furniture polish when I finished.
My approach was to keep layering on the oil and after every 5 coats use some wet and dry with oil on it to gently smooth the surface. The body had many more coats than the neck. Neck had about 6 coats from memory.
Hope that is of some assistance.