When I signed up here at ECF the username throathit was taken. I took it a step further and chose throatkick as I enjoy a warm, full but extremely noticeable sensation as the vapor is inhaled.
To answer your question, yes, some people do use this as a means of increasing throat hit. You will see many threads about PGA (pure grain alcohol) and even some additive enhancement products that are sold separately. These products have names like Throat hit plus etc.
I have tried this method but quickly realized the sensation created is not the same. It is more of a burning/stinging sensation that is produced. Whether or not this is something you like is truly a matter of opinion. I am simply pointing out the differences as I perceive them.
In my estimation, the real solution to throat hit lies in the following:
(in order of importance)
1.A PV/atty/carto combination that creates enough heat to satisfy your level of TH
2.The right concentration of nicotine
3.The right liquid (some flavors hit harder than others)
The quick and dirty method would be to
buy a lower resistance carto than what you are using now and/or buy liquid with a higher concentration of nicotine.
Personally, I use 2Ω and 2.5Ω dual coil cartos at 5v. With this combination I get that warm, full and satisfying feeling and I managed to actually lower the concentration of nicotine.
All the best!