I have said so many times, if you don't want to buy new tires, do not use Armorall or other similar products. They are for real car only. The petroleum contain will harm your toy tires in long run. Use pure silicone oil (矽樹脂油) or glycerol (甘油) only.
I have said so many times, armorall is ok with rc tires
It won't damage the tire instantly. But if you apply it on the tire regularly, in long run, may be 3-5 years, you will see some damage done. Actual experience from a friend.