[Table on sliding compound miter saw is froze]

I am afraid my saw is also ruined. I can't tell for sure, but I think the lock is free, You can hear a clunk when moving the lever. It seems that the two parts of the table are fused to each other like they are welded together.

[Table on sliding compound miter saw is froze]

The table is either aluminum or magnesium, not sure, but it has seen some weather. I had a cover on it while outside, but a storm blew it off and the saw got wet. Sometime later the swivel table froze, and I have not found anything that will free it. I've taken it apart as much as possible and tried WD-40 for days to no avail. Any ideas?