Yes, PE would be the answer and I am using some left over PE from other kits for ladders, stairs railing, etc. Whatever will work to enhance the detail. I am working on the mid second level section now. Pictures to follow. I have also intalled the aft catapult crane and am pretty happy with results. Either I'm getting better at this or the kit area is better rendered. Well worth the effort folks.. do give it a try. I get the impression that Digital Navy produces a better kit. They have instructions for what they call 3D paper etch.. the idea is to prefold and glue the part from 2D to 3D, then cut out the areas between the girders. I have not tried this, and frankly do not see how that would work, even with a very sharp number 11 blade. I think the first few cuts might work, but as the structure loses its internal strength, stability will result in destortion and crushing at this scale, unless the grid can be supported somehow. Dennis