I applied my third coat of epoxy to hull about three days ago, could not get back to work on it fast enough. I have been sanding between coats as recommended. However, I went to sand and it is smearing in spots- I am guessing "blush"? Could it be anything else? Tempertures did drop again, could this be effecting curing process?. Night it drops into 30s, day it is in high 50's, low 60's. I know without seeing it it is tough to diagnose, but a little concerned about applying my primer over it if it is blush- will primer adhere to blush? Plus it doesn't seem to want to sand smooth? HELP.