A closer look at other leaves and plants bought from the same store has me thinking that it's scale.

So my next question is, HELP?!

•Can I use neem oil on succulents? The plants all look very healthy and I've scraped off all of the bugs I could find.

•Does scale spread easily? (As in, to plants on the other side of the room? I'm limited on space to quarantin them in)

•How can I be sure it is actually scale? I'm 99.9% positive, but y'know...

Yes, scale spreads easily.
If scale, usually there is a red (blood) mark left if squished.
Easily wiped off with a q-tip moistened with rubbing alcohol.
Scale is roundish, brown 'bump'
Google 'scale insect' for good photos.
If hard to 'scrape' off, it's probably not scale.
It may be just a mechanical injury that callused over (there is crack visible on one of the leaves)
Here is a photo of similar damage - not scale:

Hmm... That's very helpful rina_ There were places that were more circular with what looked like a dot in the middle, which I thought was a sign of scale. But nothing I scraped off was red.

That's lucky that you could do that deva! There aren't any ladybugs around here this time of year. It's just a little early for them :) But, maybe I'm lucky and it's just injuries that have callused over!

sdm
The plant in photo was just repotted today; I bought it few days ago. It was in very wet soil, few bottom leaves were all mushy. I washed all soil away, let it dry on a towel and potted up.

I always use gravel or small rocks for top dressing, it helps to keep lower leaves from sitting right on top of soil (these echies have short trunk). Here it is in it's new pot:

Rina

Rina, your echeveria looks very cute :)

I've never been sure about putting rocks on top of my soil like that. I've been considering it but I'm concerned it would hold in more moisture and I would have difficulty checking how dry the soil is. Do you have any issues with it?

No issues, gravel is part of a mix I use to pot all my succulents.

I use chicken grit that I can get easily in farm feed store; smaller size (#2 or grower) for the mix, and little larger (hen size, or turkey grit) for top dressing. Small pebbles (like a pea gravel) are good for that purpose too. And bigger rocks - usually for supporting newly planted plant.

Some ppl use even shells, or glass beads/shards.

What do you use for potting?

If necessary to check for wetness, use a wooden skewer, insert into mix at least halfway. If it comes out damp/cold or with particles sticking to it, soil is still wet enough.

Rina

I've got Mirical grow cactus soil that I lightened with some chicken grit, perlite, and some small aquarium gravel. I always pot in unglazed terra cottage. It's certainly worth a try, and it would be nice to have something to keep my perlite from floating away :) I've got some small aqarium gravel that I think I'll give a try.

How much is 'some'?
There should be a list of ingredients listed on bag of soil.
Chicken grit (do you know the size?) is good, so is perlite and/or aquarium gravel. No more than 1/3rd of amount of soil - I would use less than that. Some ppl don't like perlite for exactly that reason - it floats and could be blown away easily. That is another good reason to use top dressing, to keep it in place. Top dressing doesn't have to be larger, aquarium gravel would work well.
Succulents could be grown very well in inorganic mix - just gravel, perlite, turface, scoria...

Well, I don't know the actual measurements of what I mixed. I generally don't measure things like that, even in cooking; I just wing it. I did use size 2 grit, but my main requirement after everything I read was that it was loose enough when wet. I might lighten it with a little more perlite if the top dressing isn't going to cause any issues (which is awesome to know, thank you!) but for the most part I'm going to stick by 'if it ain't broke don't fix it.' I've had some of my plants for nearly a year now and they've had noticiable growth and improvement from the time I purchased them :)

However, if I did grow in inorganic material would I have to fertilize with each watering?

Yes, you would need to fertilize. I add time released fert into a mix, and that helps. I wouldn't use full strenght fertilizer with each watering, rather 1/4 - 1/2 = weaker solution more often. I don't think it is too much work to add some fert into a can/bottle of water whenever I water. (Btw, I didn't use to fertilize succulents, just getting into doing it regularly now).
Do you think that there is lots of nutrients in bagged soil?
I don't measure ingredients either, but could tell approx. amount and add less soil if I use it at all. Most of my succulents are in mix of grit+perlite+turface, some in grit+perlite or even grit+turface.
Sounds like you already have well-draining mix. Sorry this thread 'de-railed' from scars on the leaves to potting mix...Rina

No, it's not too much trouble to fertilize, I was just curious how frequently you did :) Actually, I mix up one big batch of water with African violet fertilizer right now. I like to let it sit for a day or two before using it on any of my plants, and my succulents seem as happy as my violets with it!

I never thought there was tons, but a fair amount. But then, if fertilizing my succulents helps them instead of frying them it can't be too much.

I had an awful time finding grit, which is crazy in a farming town like mine. Turface would probably be impossible, at least in a reasonable amount.

But, it's definitely well draining. I just soak them every couple of weeks and they're more than dried out by the time I water again. And no worries, I've been keeping an eye on them and they're looking fine, and I'm always happy for more opinions on plant care :)