I have corresponded with a few Muse guys regarding the new characteristics of 1.3.3 Hotfix chemspray (no cooldown incurred unless there is one more stack of fire on the target component). According to Bubbles, this is a bug and not functioning as intended.
Therefore, I want to ask the Cogs organizers if it is acceptable to use chemspray during the event, until it is fixed by Muse.