Yes, the port lids work fine. There is a limited range of movement on these that Mantua supplied. I checked that out before fitting anything. Straight out of the box, the port lids do not close. The top of the frame prevents the lid from getting anywhere near closed. To enable that, I would have to bend the frame hinges forward, but that results in snapping them off, so on my model, they will be held open by steel cable as on the real Victory.
As for paints, I have those supplied with the kit, but I will be using Tamiya acrylics with my air brush.
Another Mantua problem that I am working on, is the cannons. All the same diameter. Only two lengths provided for the quarter deck, poop deck and forecastle, whereas when I walked around the decks on board Victory, there are three lengths for the 12 pounders there. I'm reducing the diameters/shapes for the 12 and 24 pounders on my lathe. The 30 pounders for the lower deck can stay as they are.