We have an ornamental tree in our garden and it is completely covered in white little dots. They look like eggs or larvae, but I’ve never managed to see them move.
This is in Spain in case that’s relevant. More pics in comments.
I don't know if this will help, but I had to resolder the cables to the bed of an old printer and the iron I had just couldn't put out enough heat; the bed sank it all. I put it in the oven for a while, so that it was pre-warmed and the iron could melt the solder.
Probably using the kitchen oven where I cook wasn't a very good idea, but hey, I'm still alive.
We normally have a ton of wasps later in the summer, which is a problem of its own because they become very aggressive and territorial. We’ll try to mitigate the scale, though it seems a bit late already.