Laminating and tolerances

I am a rookie to paper as a media. I am going to build the Digital Navy USS Oregon. I know this is overly ambitious, but that's what I'm doing. My question is about tolerances. Roman Detyna recommends Staples Photo Supreme Matte and that's what I used. The hull formers are to be 1mm thick. The paper is 0.23mm. If I laminate it, 3 layers is 0.82mm, 4 becomes 1.13. How close do I need to be? Do I go + or -? I took my micrometer to Michaels, but could not find any combination of things that would come any closer to 1mm. When I laminate, is there any real benefit to alternating the direction of the layers, assuming there's a grain involved?



Also, if I use a spray like Scotch Super 77, is there a chance of delamination with time? I've read PVC diluted 50% is better! but with the size involved I can foresee a disaster happening.



Any thoughts or suggestions?



Kurt