The painfulness of dermaneedling is really individual as well as other factors such as how long the skin remains red, how much pinpoint bleeding there is, how much the skin peels afterward setc.
I am glad you found it bearable, even with long needles.
Solarcain products contain a low percentage of the numbing ingredient benzocaine or lidocaine and it likely helped a little.
Yes, you can use the single needle, the dermastamp and the dermarolling during the same session. It does not matter what you start with but for practical reasons it is better to start with the most targeted instrument and finish with the least targeted one. It means first needle, then stamp and then roll. The reason for this sequence is that if you fist roll, the entire area will become red and you will not be able to see and target precisely the scars or the wrinkles (or whatever is your goal) with the dermastamp or the single needle.
The general rule is, do not roll again if the skin is still red, dry, tender or swollen from a previous session.
I think you do not have to worry about the glue of the needles because the main ingredient of that product was ethanol and all the other ingredients except the main one are added in very small quantities.
To be honest, it did not cross my mind they would add acetone to rubbing alcohol because rubbing alcohol is intended for skin disinfection and there is no reason to add acetone.
I guess they added a little acetone to denature it (to make it impossible to drink).
Ethanol is usually denatured with isopropyl alcohol.
Rubbing alcohol usually contains ethanol or isopropyl alcohol or their mixture.
The only reason why a very high percentage of (not denatured) ethanol is regulated is to prevent it to be used for drinking and thus avoiding the very high taxation of alcohol that is normally levied for alcohol indented for consumption.
In other words, they have to still allow for example laboratories or hospitals to purchase a high percentage ethanol cheaply (without high added taxes) but they have to prevent that it is sold for consumption because alcohol for consumption is subjected to huge taxation.
This is the reason why it is so difficult to get ethanol that is not denatured by isopropyl, acetone etc.
Isopropyl alcohol is also a solvent but we found out that in percentages up to or around 50% there was no problem to use it for soaking the dermarolling instruments. Several of our customers soaked their dermarollers in 80% isopropyl alcohol and the roller glue disintegrated.
Thank you for documenting your dermaneedling experience!