I recently did recaulking, I don't consider it a problematic job anymore, you have a lot more teak surface I only have teak in the cockpit, but I think recaulking is still a much easier job than removing the entire teak.
It turned out to me that removing the old caulking compound is not difficult and goes quickly. I mostly used a chisel that I sanded down to be narrow enough to fit in the space between the planks. First, I would make cuts with a knife on the left and right sides, and then remove the old compound from the bottom with a chisel. Each side of the space would be sanded by hand with sandpaper, it's also not difficult and goes quickly.
I used the technique of masking with tape, and removing the tape while the mixture was still fresh. Applying the sika compound turned out to be the hardest part of the job, as I had a manual silicone gun and I got tired quickly. Before removing the tape, I would smooth the compound on the upper side, Sika shrinks minimally, unlike TDS.
At the end, when it dries well, I lightly sand it.
I am satisfied with the results.
You should pay attention to the weather forecast when applying the compound, it must not be humid, and it must not be in direct sunlight either, as bubbles will appear.
I wouldn't suggest heavy sanding, because the wood will turn gray again after a while anyway. It is important to me that the caulking compound remains healthy. I think I destroyed the old caulking compound with teak cleaner (hempel powder), which is too aggressive for caulking compound.