Looking for advice on filling a gap between wall and sink

[mercuryblues]

9. That sounds like a good way to go

Building up the wall whether by bondo or spackle to level it out to just a small 1/4 in. gap then caulk. I have found the easiest way to caulk.

get some rubber gloves, a bowl of water and some paper towels or a rag. When applying the caulk use a steady hand and move quickly while applying a steady pressure on the caulk gun trigger. do this in 1-2 ft sections at a time. With the gloves on your hand, go over where you applied the caulk to push it into the gap and give it a smooth finish. When too muck caulk gets on the glove dip it in the bowl of water and rinse it off. Don't worry about drying the glove. IMO it helps to spread the caulk. If you don't like how it came out dampen the towel and clean it off. Start again.

With a bigger gap don't try to fill it all in at once. Do it in several steps.