The good news is that your varnish will be fine. Follow these steps to ensure best results:
- Unthaw it to room temperature for at least several hours and for several hours after getting all of it to room temp to make sure.
- DO NOT SHAKE – that will create bubbles
- Gently stir, much like when stirring paint but again, avoid bubbles
- It will take a while to thaw; gentle stirring will help.
- Warm (up to 100F) and gently agitate contents before use.