I did search a couple of times before this post but "sap" falls into the 3 letter word category and is skipped by the search....grrr.
I finally have a project that is decent enough to post here (a arbour for the MIL). She wanted a white paint finish so all ideas of nice joinery went out the window. My posts are douglas fir and one of them is oozing sap despite having two coats of zinsser 123 and two coats of SW A100.
If I had realised about the sap issue I would have used some shellac on the area and I guess I still can but that will require sanding back to the bare wood.
Does anyone here have any suggestions other than sand and shellac?