When I'm summoning a demon can I draw its sigil on a plate or wooden table im using as a satanic altar instead of paper? Can I put a lit candle on the demons sigil as an offering to him? I wanted to summon Gremory and make a deal with him in exchange for assistence. I basically just want...

When I'm summoning a demon can I draw its sigil on a plate or wooden table im using as a satanic altar instead of paper? Can I put a lit candle on the demons sigil as an offering to him? I wanted to summon Gremory and make a deal with him in exchange for assistence. I basically just want...