wow, I would pass on that, i use a 10% SA weekly and that really can sting and dry....

If this is the first time you've tried it, go slow, follow directions and use the 20% single layer....see how your skin reacts and go slow from there

i have use 1 layer before already and its manageable but i want to do more layers for deeper pentration and for it to frost

so i put 2 layers and it frosted

if people can do 3-4 layers of tca at 25% i think its fine