ok lately i've been asked alot for advise on helmets so i thought it warnted a tutorail keep in mind this is only a genral guide to the basics feel free to get as creative as you need with it to make whatever it is you need
using this mathod as a base i've made theese
http://images.cosplay.com/showphoto.php?photo=908362
http://images.cosplay.com/showphoto.php?photo=679827
http://images.cosplay.com/showphoto.php?photo=648963
Matrails you'll need
cardboard
hotglue
bondo
paints
Tools you'll need
cuty things
a hotglue glue
paint brushs
a pen or penceil
ok lets get started than
http://i12.photobucket.com/albums/a2.../tuts/ht01.jpg
1) Cut four 1" by 12" pieces of cardbaord
2) Cut two of the strips of the to fit around your forhead and glue them togather with a thrid strip to fitted to over the top of your head but be sure to leave a half inch sapce at th frond and back
3) Cut a cricle 2" across than bend the disk till it has a slight domed cruve
after that hot glue it to the bottum middle of the over the head strip
http://i12.photobucket.com/albums/a2.../tuts/ht02.jpg
4) Cut the 4th strip fitted in two pieces to the side of your head from the middle glue it on to the dick than on to the band agian leave a half inch space from the bottum edge on of the head band
5) Cut two pieces each as wide as half the cruve between two of the head strips (they should be about 7" long but thats not realy important). Bend one of the pieces untill it good and fexilbe ( don't worrie if it looks abit beat up). hold the piece agnust the inside of the over the head strip and trace the line than mirror that line to the other side of the piece afterword cut the shape out. Glue the tip to the disk and the bottum to the band agian leave a half inch gap to the bottum of the band (cup away extra if you have to)
6) Bend the second piece as you did the frist than trace the lines from the inner edge again. Cut the shape out and glue it in tp place just like step 5
http://i12.photobucket.com/albums/a2.../tuts/ht03.jpg
7) Repeat steps 5and 6 till the cap is all filled in
8) Fill the cracks of the gaps with hot glue
9) Cut a rectangle that fits around the edge of the cap and glue it to the rim it should go almost all the way around just leave a gap for your nose
http://i12.photobucket.com/albums/a2.../tuts/ht04.jpg
10) Cut away piece fro your eyes and neck as needed
11) Cut slits out as seen here
12) Pull togather the sides and glue them in place with tabs on the inside
http://i12.photobucket.com/albums/a2.../tuts/ht05.jpg
13) Make and glue a strap for the chin (make sure to leave enought room to get your nose in and out)
you might get something the looking like this at this point
http://images.cosplay.com/showphoto.php?photo=903080
NOTE: after this point your pretty much have a good base to build out from and make anything you like so the fellowing steps are realy only a basic exmaple to finshing soemthing with it
14) Build what ever details you may need
15) cover the cruved srufaces witha smoothing agent
like bondo than sand and of crose paint as needed
hope this has been helpful love to seen what your all able to make with it