I have a 1984 Catalina 30 named Imagine and have essentially re fitted the entire boat down to a few smaller details.1. I have stripped and sanded off many coats of old varnish on my hatch covers. I'm ready to re-varnish. I'm not sure if they are teak and if so if they should be vanished. I would like to do it properly and would appreciate any knowledge coming my way.2. The sliding hatch cover at the companion way is very difficult to move within 12" of closing. It appears that I will need to drill out the wood plugs to get to the screws to remove the wood slide channels at each side to remove the hatch cover to hopefully make it move smoothly. Again, I would appreciate any help that anyone has to offer.Thank you,Barry