I have a small tin of clear matt lacquer and a tin of clear matt varnish, both water based and interior. These were purchased only several weeks ago. Today I had need of a clear finish, and on opening the tins they were both as white as milk even after stirring so I haven't actually applied any yet. I've never used any water based before so I'm wondering if this white colour is this normal. My internet searches only come up with results about finishes that have dried white/milky. The tins have been stored in my garage/workshop which is attached to the house, and while temperatures, with a bit of temporary heating have been around 15c today, they may have dropped much colder at times since purchase, could this be a problem for storage?