For example I would scrape the letters and the circles down with a knife or something, while doing a FRTR. Than if it isn't a divine's sigil I would probably put it in the trash even if the letters is no more on it.
I have a "flag" with a pentagram that has only just a circle around it. It can symbolize endlessness but I'll put it in a bag than in the trash anyways.
If the circle would be a snake eating itself, I would keep it.
If there would be Satan's sigil with double circle and or with hebrew letters, similarly, I would do a FRTR and cut the letters out, but this time I would not put the sigil in the trash. With the letters cut out, I would trim it, so it's just the sigil that is left, I would gently wash it, than I would do an aura cleaning on it, than I would put it on my wall or I would put it in a safe place, even if I'll never use it again. The same with any other demon sigil.
If it'a a JEWelry, than If it contains hebrew letters, I would melt it down if possible and than throw it out, or make something from it, or if it isn't metal I would break them into peaces and put it in the trash. If it's a painting (for example of jewsus) I would burn it, while doing the cursing the 72 names of "god" RTR. If it's the bible I might take the time and do all RTR and burn it slowly, or just do the FRTR and burn it.
We should take advantage of them and use these to amplify our curses against the enemy
Alexandre Cabanel's painting of Lucifer is fairly okay, at least he did not painted him as a monster. But I would not put it on my wall, if it's on the wall somewhere in the house or it isn't put on the wall, it's fine.