Thanks man!! That really means alot! And no, it's 100% foam and time, just ask my wife, she barely sees me at home when I'm home now. Haha
Here are my new found practiced techniques that give me the cleanest seams:
I have tried many knives, I have settled for doing all my cuts with the smaller #11 exacto knife. Gives me the cuts i desire. The cleaner your cuts, the cleaner the seams. Also, this is a big one.. I do not cut out all my foam pieces at once before building. I cut out each piece one at a time and do all my angled bevel edge cuts while still part of the foam sheet. Some cuts angle out, some cuts angle in depending on how the piece goes together. I get extremely clean angle cuts that way and rarely do I have to re-cut an edge by doing this, but that's because I study each piece before I cut it out.
Once cut, I use a dremel to sand edges if need be to fit together before gluing. As for glue, I use the loctite 5sec super glue, it's amazing, quick, and strong. but on most parts, takes more like 20 secs before I let go of holding joined seams. I use a sharp scrap piece of foam to smooth glue on the seam when it bubbles out (angelegend technique). Then as everyone know, I line the total inside of my armor piece with shoe goo, I'm not kidding, it makes it nearly indestructible!
Lastly, I double back with 320 grit sand paper and sand all my seam edges to remove any dried glue edges and to smooth out any foam imperfections that may be on the seam. This sand paper I have found works best, no courser no smoother. To course tends rough the foam to much and to smooth of paper doesnt have any effect on the seam and tends to polish rather than remove.
When this suit is done, I don't want anyone seeing seams no matter how close they get unless I want the seam to be seen for game accuracy detail.
I hope this helps, I know everyone has their own style and there is no right or wrong way, this is just what is working best for me and giving very clean results.