Here's an image which, although not particularly interesting is one I wanted to work on.
I needed to use a small aperture of f22 for this shot to slow everything down as I didn't have a neutral density filter, and that's where the trouble starts because a small aperture shows all the dust bunnies.
At a glance, there's only a couple of dust spots visible, but once I look at the top half of it in Lightroom.
Every one of those stands out like a sore thumb at 100% and not only does it fail my own QC, it would fail Alamy QC, and get me a short uploading ban.
This is what it looks like as I remove, or clone out the spots.
Then, a little more work and I have the finished image.
It's not a keeper for me, unfortunately, as it is, as I said earlier, a bit boring, but it's all good practice.
Dust bunnies will always be a problem with DSLR mirrored and even mirrorless cameras even with the utmost hygiene practices and care whilst changing lenses, and, for me, it's why I may go the way of mirrorless compacts (think the full-frame Sony RX1, RX1R) when I next change my main gear.
Canon 6d 10 seconds ISO 100 @ f22. Poniente beach and Peacock Island, Benidorm, Costa Blanca, Spain.