RotFix as a paint primer
RotFix Sealer is a great product for consolidating or hardening soft or rotted wood. It's also useful as a general purpose wood sealer. If you have wood to paint, and it's a little soft, but not rotted away to require a full repair, Rot Fix epoxy sealer will act as a primer for paint.
The Part B hardener has gotten darker over time. Can I still use it?
Probably. Hardeners yellow and darken over time due to contact with air and sunlight. This does not affect their performance. If the batch date is older than 3 years, to satisfy yourself do a small test and make sure it cures properly. Batch code: XX(YEAR) XX(MONTH) XX(DAY).