While doing an overlay tonight I was wet sanding and noticed the touch up areas started turning this milky blue color. I’m assuming this is from the moisture???
I had thought that the resin had cured but I guess I was mistaken. I’m pretty sure the weather has slowed my cure times way down as even I type this its below freezing.
So my questions:
Will this go away or am I stuck sanding this back out?
What do you guys that live in colder climates do to deal with tempatures?
Using epoxy in cold conditions is a no no, temperature is crucial minimum 20c,it will Cure,but a little heat will help.
Depends on the epoxy what the minimal cure temp is. Recently I stuffed bleeder in to every hole I could find, The workshop wasn’t properly insulated(still isn’t, but at least its warmer now 
)
Cold is a problem with thermoset plastics. Just get it warmer. Temperature has a huge part in the hardening process.
I didn’t get epoxies turning another color, but depending on humidity epoxies will get amine blush
Epoxies will turn whitish if you get them wet when they aren’t cured properly. This can either be from improper mixing, incorrect mix ratio, wrong hardener, or incomplete cure. In this situation the resin was not adequately cured due to the low temperatures. Heating the part up for some time will fix the issue. The whitish/bluish areas may never cure properly now because it has absorbed too much water.
Some resins have a good early water spotting, some don’t. In general the more “performance” resins are not so good at water spotting.
Make sure you cure your parts thorougly before getting them wet.
What do you guys that live in colder climates do to deal with tempatures?
You might be surprised, but over here we install heaters…
Thanks guys!!!