M205 does NOT have dusting problems in fact one of the easiest polishes to work with.........m105 does untill you perfect your technique.
People seem to think if you want to use 105 you have to use 205 as follow up. very much untrue.You can use 205 on its own combo'd with the right pad and achieve some awsome results.And you can use brand x if it works for the results your looking for.
Here is what I keep on my shelf as far as compounds and polishes goes....
Megs 105,205,D300,ultimate compound and polish,D151
Optimum CompoundII,polishII,finish polish
mothers pro series compound/polishes
Menz sf4500
I work with MF pads 95% of the time.....megs,Optimum,LC,
Lc hydrotechs are my foam pad of choice and
Purple foamed wool pads.
And thats it.
I can accomplish just about anything with a combo of anything listed above mix and match.
Everything is paint dependant...thus the most uttered words around "THE TEST SPOT"
there is no one compound or polish that will do everything all the time,period.
there are so many variables in compound and polishes and paint.....that it takes experimentation with different products to find what works and what doesn't.
Duragloss products are Great! Most of there products are for cleaning/polishing/lsp they really don't offer a "Compound" to correct.
I've probably rambled enough.