Ripped down a wall dividing kitchen and living room. Need to extend the floor into the kitchen.

Need to join (butt joint ) new and old
Using 1/2" x 2" red oak
Will need to trim the edge of the existing to make a nice straight line
Need to use a spline router bit to join a 5" transition board, then butt new floor into that
Need to finish the new floor
Need to abrade the existing floor
Will stain new floor then poly?


Need help joining floors
1) I thought I would run a 5" oak board prependicular as the transition, spline cut to join transition board with new floor.
2) what do I use to abrade the existing floor
3) will stain 3 coats of Jacobean new floor
4) do you think running a router with a spline bit down the freshly cut edge to make the receiving joint for the transition board and to receive the new floor ??

Pictures won't embed so just click on them

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This is the idea
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A quarter sawn or riff sawn board would be mu choose for a five inch board to join the floors, glued down. You will have to make your own spline as far as I know.
180 grit sanding screen or sandpaper will dull the surface for another coat of finish. Check a spot for adhesion. If you are planning to apply two coats of finish, you could use 120 grit to abrade the surface.
Normally two coats of stain will be all the floor will accept. Extra stain from the third coat will wear off easily. This dark of a stain will show machine marks from sanding the wood of not done carefully. Hand sanding 80 grit with the grain will help with a dark stain, after you are done with the machines. Too smooth will not absorb stain very well.
A spline bit that may work would need to be about one eighth of an inch wide, like the tongue of the flooring, and only about three sixteenths of an inch deep. Some bits will not have clearance for this job. I have one that I got for Masonite laminated flooring.