Wow...I've been gone for a long time but now I am back 
I had a question about my Z2, I put on a coat after about 6 months, and the it is so hard to remove now? Should I z1 again? Also, I have about 12 coats of Z2/Z5, I have been neglecting it, no Z applications for 6 months! OMG!. But now, the surface isn't as clean as it use to be. Should I just start over?

I had a question about my Z2, I put on a coat after about 6 months, and the it is so hard to remove now? Should I z1 again? Also, I have about 12 coats of Z2/Z5, I have been neglecting it, no Z applications for 6 months! OMG!. But now, the surface isn't as clean as it use to be. Should I just start over?