Bed Finishing Concern
I've recently undertaken my very first woodworking project; I decided to do a Spruce King Sized bed frame for a memory foam mattress. Although Iím close to completion, I have a few concerns of my finished product. I apologize in advance for the long story but I would like to give a description of what I've done and the mistakes I've made and learned from throughout.
Alright, so I started by finding a plan, making sure the dimensions were correct and went to the local lumber store to buy some cheap but decent wood for a bed frame. I was suggested to go with Spruce, and from what I read, it was a reasonable and economical choice.
I got home, trimmed all the wood to the appropriate dimensions. Then I started sanding; since a lot of the wood was knotty and rough, I started with from a grit-40, to 60, to 100, to 150 (stopped there for slats and joists) and finally to 220 on the external ones exposed ones. At around 150 grit, I noticed that the knots weren't getting that much smoother, some still had holes and potential sheet ripping edges. A few Google searches showed me that I should have first applied some wood filling on the knots and rougher areas.
And so I went back to the store, bought some wood filling and filled all the gaps and problematic areas. Sanded back all these spots from starting with 100 grit, to 150 and 220 as was mentioned before. The job looks ok, but had I started with the wood filler from the start, the patches would have looked a lot cleaner.
Next off, I cleaned everything to remove the dust particles (vacuumed, tack cloth, and finally some cheesecloth dipped in denatured alcohol). I pre-stained everything and applied a nice stain on everything.
My main concern at this point are the ______ (I have no clue what is the proper term to describe this, so please see the attached picture) which will most likely rip off my bedding sheets or even the mattress. I tried sanding these things but I just seem to be digging in the wood without removing. I tried ripping them off, to quickly learn that they take away much bigger portions of the wood. I tried cutting them from the opposite direction, to no avail. I tried adding some wood filling with a light sanding, which has worked a bit on some of them, but on some others it hasn't.
So where should I go from there? As you can see in picture 2, the stain has revealed that some slats still have these ______.
Are there any quick fixes to this issue?
Would a polyurethane finish or a wax seal them?
How do I avoid this problem in the first place?