Since I was stuck I was doing other things, other projects but once in awhile thinking of how to get over this problem. I told my ceramics professor about this problem I was having. The good thing is, although he is my ceramics professor, he also works with many different materials, and has a lot of experience in this things.
He told me that I could by an acid, that is very cheap and available almost everywhere, mix it with small metal pieces in order to make that the acid will only corrosive enough clean the metal parts making it easier to solder together.
The acid is muriatic acid, and the metal has to be small zinc plates. This process has to be done outside because of the toxic fumes that come out of it, and in a thick small glass recipient. The process has also to be done very slowly or it will heat up to a point where the glass won't take it, and crack. (I do not have any images of this process, in case you’re wondering.)
But before I would do any of this I wanted to try if it would work. So After talking with my teacher I brought a little bit of the wire and the solder I was using so that I could try with him. Because who knows, maybe it won't work either way… Since he already had a little bit of this acid concoction, it was no problem for him.
And so I did, I once brought a little bit of the wire and the solder. We first heated a wire part with a soldering wire and with a paint-brush wet with the acid cleaned that hot part. Afterwards, while still heating it, we put the two wires together and la little bit of solder. 2-3 Seconds later it was soldered together. It worked.
(I've been searching for a picture, as soon as I find it I'll edit it in this post)
I now had a way to make my horns. I also tested how strong it was by pulling the two wires apart trying to break it. Eventually it broke, bun only with a lot of pressure.
Now I just had to find and buy muriatic acid, and the zinc plates. The zinc plate could be farrelly big, I would cut it to the size I wanted / needed.
