3 - Preparing the bridge area
All the flaky wood fibres pulled loose by the removal of the bridge need to be sorted out and by the time it was sanded we had a smooth concave trough in the under-bridge area. Next we took a spruce offcut and sanded it down to a thickness of just over 1mm. The offcut was then divided into smaller lengths, and the undersides were sanded to create a slight curve. This curve, coupled with the clamping pressure, allowed our spruce patches to conform to the damaged surface of the body.
Once the pieces were glued in place they were left for 24 hours. Insulation tape was carefully laid along the edges of the bridge footprint, and we used a very small sanding block to make the patches level with the surrounding top. We chose Titebond Original glue; it sets very hard and will prohibit the bridge from moving. The glue joint should be stronger than the wood fibres, so there shouldn’t be any structural issues.
3. Acoustic Rescue