1000+ questions about gold, silver, and metal leaf; gilding supplies, tools, techniques; edibles; craftwork; and troubleshooting.
Yes, you can use gold leaf for that application when the surface is prepared correctly and the leaf, size, and protection match the project.
Yes, glass can be gold leafed, but glass gilding is a specialized surface technique.
Glass does not absorb size like wood or plaster, so adhesion, cleaning, and technique matter. Reverse glass work, verre églomisé, sign glass, and simple decorative glass projects may use different methods.
Clean glass thoroughly and avoid fingerprints. Decide whether the leaf will be viewed from the front or through the glass, because that changes the order of application, backing, and protection.
The surface determines the gilding system. Wood, frames, furniture, glass, walls, ceilings, metal, paper, leather, and exterior signs need different preparation, size, leaf, and protection.
Start by identifying surface and exposure, then clean and stabilize the substrate, smooth/seal/prime or ground as needed, choose the right leaf and format, apply the correct size, wait for tack, lay leaf, brush, burnish if appropriate, and seal only when required.
Wood is porous; frames may need gesso, bole, or water gilding; furniture needs wear planning; glass may require reverse-glass technique; metal needs cleaning/degreasing; walls and ceilings need coverage and access planning.