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@doctor_john
Depends on the applier. You are right about the small evolution that
came to powder coating the last 10 years but concerns the appliance
of it, not much of the composition.
You can find shops that could add 90g - 120g of paint on a 56 frame for
example, or someone that could add several less.
The main point is not the grams when we build our everyday bike (i hope)
but the quality that we gain in relation of the cost.
If a carefully applied powder coat cost more than enamel and we don't
need its' confessedly stronger characteristics (that we percentage loose as we try to achieve finer finish) why bother?
Do we need stronger paint than a slowly cured enamel?
If yes, the powder coat is a nice option.
Are we talking about single layered powder coat? one color, without clear coat or secondary colors etc, that could double the weight?
You can estimate a single layered coat as double weighted instead of a complete
enamel paint including decals and many colors. That is not a weight advantage loss in
my opinion if you think that you need a more durable paint.
I try to use light powder coat only when i think that enamels' durability is
except prescription of the use and anodized paint doesn't apply or create
a "confusion" depending the bikes' overview...
this is an example of a fine powder coat that could be achieved
without causing trouble to parts' primary use, i measure it at an average of 0.1mm