They didn't prove your points at all. The lava did indeed stay liquid for a while on both scans. Lava from volcano's may take up to 30+ years to completely cool down, while within the first 5-10 minutes it has cooled enough to make it possible to walk on. This makes it evident that lava's high temperature is instantly cooled down, while once it reaches say 400 (random number, but decently accurate) degrees and below, it is quite hard to cool down. And you are correct, I had misinterpreted the scan in which she did(n't) use suiton. However, you claiming it took any amount of time is irrelevant (not that you did) since we don't see her lava for more than 6 pages including the two pages in which she was still releasing her lava. Saying that time was not the same as the time it took for her lava to harden against Sasuke in comparison of a ratio between the two quantities of her lava is speculation. The time she used it against Sasuke, the lava had not hardened for two chapters; next chapter after she used it [
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]. Proving that she can't manipulate it. When she used it againt Madara, it wasn't shown again after 6 pages, so we can't assume how long it lasted, nor can we assume it ever hardened. This proves that she can't cool/heat it at her own will. While the next chapter during the Sasuke fight, also shows how it began to harden the lava, which is portrayed by the lava's viscosity heavily
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. Once viscosity is high, the temperature is much lower. Moreover, Gold, being a metal, is a good conductor. The quantity of gold is immensely superior to the quantity of lava, and thus will adibiatically cool with the rest of the gold in attempt to reduce the initial heat on the rest of the gold, hence it heats all the gold, while removing the capability of the gold in contact to the lava to magnetise. This will mean that the lava will lost its heat quicker due to its energy being lost rather quickly due to the highly conductive metal, gold.
Moreover, all this debate can be avoided when we state the fact that gold dust can not only dodge the slow moving lava, but stay out of its reach [
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]. The quanitiy of gold dust is also far superior to the lava's, and can spread out on a further scale depending on what the Kazekage feels like doing. Mei uses large scale lava? Kazekage thins out his gold dust until it is a giant horizontally thin layer of gold dust, in which once the gold dust is hit, won't be as effective since a low amount of gold dust is being hit. If you disagree.. then we can always recall the scale in which the Gold dust can be attacked with [
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] (top panels). This ended up adding up to a mass equivalent or similar to Gaara's
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, as seen here [
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] (Bottom panels). Mei's lava AOE [
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] =/= Gold Dust AOE [
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] [
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]
I am assuming after having said all this, I don't have to speak of pH levels altering. Not that it has anything to do with lava in the first place (I have already disproved Mei being capable of hardening/cooling the Lava). The only reason it formed a door like structure is because lava has viscosity a visocist 10,000 to 100,000 times the viscosity of water. Clearly it will not spread out when it is going down, it will simply move towards gravity. Hence why it flowed downwards, and didn't end up flowing outwards as it became somewhat more viscous. Just to show you how viscous lava can be, at some points, lava can be as a liquid yet be viscous enough to stay completely still even when it is a foot thick without anything shaping it (isolated lava).