I just received a message from a client that her gray stained table top is turning green. This was done approx. 1 1/2 yrs ago. I used 3 different colors of stain to achieve this look and followed up once dry with 3 coats deft water base sealer.

Any advice as to why this is happening. I have used this technique on many table tops prior and after doing this one table and have never had this happen.

Thank you for any advice on this issue.