I just finished mine the other night. I used the POR 15. I have used this alot. The trick is to use the three part system for best results. fisrt step - Marine clean and HOT,HOT water,this is a degreaser. 2 step - metal prep, Ortho phosphate. then the third step the por 15.
after this is cured scuff the entire surface with 220 sand paper. And use a final wash and a lint free rag.
Herculiner in my opinion is not worth the trouble,I used to use and thought it was great until I discovered DURABAK this is a commercial epoxy based product that is way, way better.
I have taken some pics and will post them this weekend.