I used it on the whole of the outside of the hull of the last kayak I built.

There were only a few places where I couldn't get it to sit flat so that there was a bit of extra sanding and filling in those few spots. It did give a nice, smooth textured finish on almost 99% of the hull.

It isn't quite the same as using saran wrap or cling wrap or whatever it is called where you come from because it soaks up some of the excess epoxy. I didn't find a significant difference in the weight of that kayak compared with several others built without peel ply. In theory it should be lighter, but in practice, I think other things could make a bigger difference.

However, given the cost, I am not convinced it was worth the effort. In fact I didn't bother with it on the deck. However I found it very useful on the inside of the deck where I like to use up the offcuts from the hull and the outside of the deck. A strip about 50 or 60mm wide did a good job of smoothing the joins.

I found it very useful on small flat or single curve surfaces such as bulkheads, cheekplates, backrests etc. I will probably use up the rest on those jobs on the next few kayaks, but probably won't get any more for big jobs.

An acquaintance who builds strip built yachts uses it all the time and insists it is worth the effort, but he is working on larger curves and enormous areas.