I couldn't find more bottles of Hilti, so I bought Great Stuff Big Gap Filler (for gaps greater than 1") from Amazon and Walmart ($3.77).   I thought results would be pretty similiar, but boy was I wrong.  I am not sure if maybe other things may be a factor, but I found that the consistency looked different and it dried differently.  I liked Hilti a lot better.  It came out in large amounts, fluffy and smooth.  Great Stuff came out smaller, and jagged-y, like whipped cream?  Didn't think much about it, and just finished off the bottle and used a spray bottle to help the expanding process.  After it dried, it looked like this:


Left side is Hilti (I was impatient and carved it already), with spots of Great Stuff to fill in some holes.  Right side is all Great Stuff, uncarved.  But look at the bottom 2 points!!!  The right side is lifting up...what??

Top half is Great Stuff. Bottom half/middle is Hilti.

So that this point, I am freaking out.  This is my first time working with expanding foam.  I don't know what happened and how to fix it.  Do I just cut off the right tooth and remake it? D:  It looks like during the drying process, Great Stuff foam CONTRACTS and pulls the foam together.  The cardboard was not strong enough to keep it straight.  I had no problems with Hilti on the other side.  Silly method, but I used a rubber band and held the left and right side together and see if that will pull the 2 sides back together.  I worked on other things, and a couple weeks later, it seemed to be back in place (as best it could).  Here is one half completely carved:

Still carving more!

and it is done!

Here is the finished look.  Sadly, I did not make the cardboard template of the wings large enough and also forgot to make it slant.  But I was too lazy to redo it and just foamed it.  Then I regretted not re-doing it lol -_-"  I tried to make it bigger with a little left over foam, and then also re-modeled it so it would slant upwards to appear bigger (pictures further down).


To fix it so that it will slant up, I cut a slit where the attachment and the wing is.  I cut out a sliver, applied hot glue there and held it in place until it dried.





After all that is dry and hardened, you can apply strips of plaster paper.  You can cut larger pieces to have less lines and ridges.  I did 2 layers on the front (the most important part!) and just one layer on parts of the back and underside.  I ran out before I could even cover the bottom side, but its not necessary.




Finished plastering!  I don't have pictures, but next step is just sanding it like crazy!  Until you are satisfied with how smooth it is.  My next Etwahl making post will be about the swirly designs and spray painting!