How is the G9 machine at applying wax and sealants or is there a better machine.
It oughta be fine. I`d think twice about using a (truly) long-throw unit like a 21mm for LSPing, but can`t think of any reason at all why the G9 wouldn`t be perfectly OK. (FWIW. my fave LSPing machines are my Cyclos, and they`re considered "long-throw" units even though I wouldn`t have called them that myself.)
Another question what is better applying sealants or waxes with a machine or by hand. Thanks
Gotta define what you mean by "better". With a conventional wax I can get a minutely better results in the sense of more spherical beads and what I believe to be an equally minute increase in appearance (but I`d have to use a Glossmeter to know for sure..it`s nothing anybody would notice IRL).
I *always* use a *LOT* more product applying by machine, which has zero upsides and various (potential) downsides.
BUT OTOH, the physical motions of using a machine are different from those employed when doing it manually, and some will find that significant (on either side of the fence).
FWIW#2, I sometimes buff LSP residue off by machine with MF bonnets. Functionally, there utterly minute diffs similar to the by-machine application, but this approach does lend itself to a sort of (what I term) "psuedo-spitshining" (which can really bite you if you do it incorrectly).
99% of the time I`ll be finished LSPing anything (even big vehicles) by hand in afar less time it`d take to get out/set up/clean up/put away a polisher, let alone the time it`d take to clean all the excess product out of the (machine) pads since it wastes so much product. (If cleaning excess product out of a by-hand LSPing pad takes more than a few minutes then something`s very wrong IMO.)
Now that I`ve shot holes through the by-machine approach, just watch me decide I want to do it that way myself the next time
Bottom line IMO: it`s just personal preference.