From your posts, you seem like a cautious and sensible person Mel. I think as long as you take the necessary precautions (ie plastic sheet cover, open windows for ventilation, work on small areas at a time etc) it should still be safe. Of course if you can avoid it, it is always best.
Volatile substances can dissolve in tank water and in some cases are known to cause toxicity or allergic response in axies. Air fresheners, aerosols and cigarette smoke for example can all potentially cause a reaction. Axies react by developing skin shedding problems.
Good ventilation will be essential.