Reddit mentions of JacobsParts Professional Solder Assist Tools and Accessory Kit (11 Piece)

I've found that eliminating layer lines isn't too important if you go down to .08mm; the big issue is that overhangs and drooping on fine details can be a killer that overshadows the smooth surfaces. A few tools I've found handy:

Get a good round scalpel handle and a pack of carbon steel 15C scalpel blades. They'll be your go-to for nicking out tiny little stray globs and trimming plastic. Way more precise and durable than X-Acto or hobby knives.

Then get a set of diamond mini-needle files — they'll be useful for smoothing rough spots. Diamond grit may seem like overkill for PLA, but the fine texture of the grit is what matters: it won't leave your models ragged and with care you can actually restore detail that's lost to droopy overhangs, etc.

Finally, get a sharp-edged "soldering pick" and use the needle files to sharpen it to a nice sharp edge. It'll be your go-to for levering out bits of support, and picking away at larger globs of plastic. If you ever find that the scalpel blade bends while you're trying to clean up a defect, go to the soldering pick.

I use both needle and snub nose pliers. Also tend to use a soldering tool to poke and break then loose. These aren't the exact ones, but the angle and the point both come in handy. https://www.amazon.com/JacobsParts-Professional-Solder-Assist-Accessory/dp/B00PQYCZPI/