The tanks came out great! I am assuming this is very hard, durable paint. For the portlites, it seems to me you have the choice of either making the lites easily removeable / replaceable, or practically permanent. If you are going with polycarbonite, you should plan on replacing them maybe every 5 years as even the scratch and UV treated types weather from the sun much more than acrylic. If the lites are smoked color, then the sealant you use, assuming it is black, won't show thru much if at all. I know it is not politically correct on any forum to mention silicone sealant, but frankly it is perfect for sealing polycarbonite lites. I used it on the Bristol and they never leaked a drop. That would be my recommendation for a permanent installation. For an easily removeable installation I would consider using Butyl sealant tape. The stuff is very sticky and stays soft and flexible and can be removed with acetone if you need to, Using Butyl tape would give you a replaceable system I think that would also be completely waterproof. Some things to think about, anyway.