oil over water
hi guys- first time posting here, i hope i'm in the right thread!
so here is my problem: 3 yrs ago i applied Behr premium polyurethane, WB, to every stick of oak in my house, doors, windows, stairs, floors, literally everything. 6 months ago my brother did the same when building his house, except he used oil based. i am really kicking myself now, my wife and i just love the darker look of the oil based. furthermore the WB i used is slightly turning a yellowed color. i didnt notice before, but i've recently started redoing my door/window trim in a craftsman style trim, and after finding out the Behr i used 3 yrs ago is no longer made, i had to switch to Minwax polycrylic. its similar but i notice the 3 yr fade of the Behr. we really want to switch to oil based now, esp. since a bit of trim is being replaced, i figured now is better than after. any tips? can i just rough everything up with a mid grade paper and go, or should i take everything down to bare wood? there are a lot of intricate details with some of the doors.
ps- using a 15 ga nailer, i dnt like the hole size, any issues using an 18 ga on oak? thanks for any help!!