Folding unbleached muslin to fit smaller frames, and replacing vs gelling practicals

[Edith blazek]

Hi, can you fold say a 12x20 or 20x20 piece of unbleached muslin to use on a smaller frames like a 12x12 or 8x8 or 6x6? Also, I was thinking of having a kit of lights I could use as practicals like astera titans or NYX's to replace existing practicals, the problem is scale, I realize I would need way more than a single kit of each's worth so that leaves me asking, can I get away with gelling practicals with color gels for that effect?