FOAM HORN METHOD:
Take a block of foam slightly larger than the final horn size. Most any foam will do for this but the tightly formed foam works best in all projects.
Now with sharp scissors trim the foam to a smooth ‘straight’ horn shape.
Now use string or twine tie the foam off in sections. Increase the distance slightly further apart as the go down the length.
Now using another length of string or twine bend & tie off the horn in a bent shape of your own choosing like this.
Now using any type of paint including basic house hold paints too (none gloss works best) paint the foam all over. You may have to do this more than once. Then allow to fully dry. This will make the foam a little stiffer not only to make adding paper strips but also to make the foam easier to add the paper strips to by not soaking up the paste or glue too quickly when drying.
Once the paint is fully dry you can start adding the paper strips. Add as many layers as you wish.
Take a selection of tubes. They can be long or short but short make it easier to make the bends in the horns when building.
Connect the tubes with a slight bend in the joints as shown. For the final tube cut a large ‘V’ out of the tube. Roll & tape it up to form the horn tip.
Now you have the armature for the horn. Simply cover in enough paper strips to allow sanding down to smooth it all out then paint it.