You can usually fix blush by waiting until the humidity is below 60% and then spraying a single pass. Next day it should be fine. Nitro burns into previous coats and will then allow the moisture to escape that couldn't when the humidity was high.
Reranch blush eraser is a last ditch as it can make a real mess if you're not careful!
Take your time and stick to the rules of 3s ... 3 light passes = 1 coat. 3 hours between coats. 3 coats a day max. Once I have the first coat on I usually follow this on successive coats: spray the 1st pass and wait about 5 mins for it to burn into the previous coats. Spray the 2nd pass and wait 10 mins to let it flash and to avoid runs before spraying the 3rd pass.
oh, and make sure you've got a decent respirator! Breathing in nitro is very bad.