lower forks yes, but you'll have to completely disassemble them in order to do so. as for fork mounts, you mean the triples? you can do the top triple easily. you would be better off spray painting the lower triple if you dont want to deal with bearing removal, etc.
Correct, I never doubted that. But are you aware of the time it takes to remove a lower triple, just to have it powdercoated for $20?
And disassembling the forks as well, and making sure that powder doesn't get inside them; also a dozen hours of work in that and re-assembly.
Just depends on how much work you're willing to put into them to get the powdercoat. Almost everything removable on my bike is powdercoated, but those two were just too much work.
If you REALLY want the fork lowers and triples powdercoated instead of painted, it can be done, but as others have pointed out it'll take a couple hours of extra work on your part.
The lower stem bearing will have to be removed and replaced. If you have the tool to do this, it's not a big deal, if not, most bike shops and machine shops can do this for you pretty quickly. They will also have to press a new lower bearing on for you after the triple has been coated.
It'll take an hour or two to remove everything to get the triples off - wheel, fender, brakes, headlight, gauges, handlebars, ignition switch, fork tubes...
The forks will have to be completely disassembled to powdercoat the lowers. If you have a service manual, it's not a big deal to do this yourself - there are also instructional videos all over the internet - just take your time.
I would put in new fork seals if you're pulling the forks apart. I'd give yourself at least an hour to disassemble both forks if you've never done it before. And another hour and a half for re-assembly if it's your first time.
How badly do you want those parts powdercoated? It's not difficult, it just takes some extra time.