Lord have mercy lol. If you used normal paper, I would just save your time and STOP!. Go to staples and buy a 250+ Package of 100lb Stock Card. After that go to Home Depot and get some Fiber Glass Resin and a good Respirator if you don't have one. If I am not mistaken Jo An Fabrics will have Fiber Glass Cloth or you can look at Home Depot for Fiber Glass Mat etc... Make sure you use Hot Glue or some type of glue that will hold real good will piecing your Pepakura together. After you have printed off your Peps then proceed to piece it together.. an ffs please be patient please ^_^. It takes a lot of time, effort, patience and money. This is not a cheap little job, if you want a cheap way well there is no cheap way, other than foam or card board with sharpie drawn on it lol. Save up about $100-$200 and make your self a nice suit of armor. Good luck bro and have fun ^_^.
*NOTE* Rust-Oleum is good spray paint I love it. Krylon is my second pick, but both look really nice as a finish. There are tons of tuts on the site to help mix paints and get good looking armor effect.
P.S. Research a ton before even attempting this, try to make your first experience at pep armor the best as possible