MikeS
Camaro Nut
This is my first encounter with a wet sanding burn through the base I'm dealing with. I did a search and several threads are mentioned how to deal with this but may are from 2011 so I wanted to see if the process changed much with the SPI blending solvents.
About the panel: it's a hood and this area is in a very visible part so the repair needs to be as perfect as it can get. It has 3 coats of PPG DBC butternut yellow base that has been activated. Followed up with 5 wet coats of SPI universal clear with 10% retarder added to 4 out of 5 coats. The base/clear is about a month old and has been curing in my garage at 80 degrees average. I blocked dry the clear with P400 initially to level (reduce chances of urethane wave) followed up with P800 wet then P1500 wet. I broke my own rule and was speaking to someone on the phone when I was attempting to wet sand out a spec with P1500 and went through the clear and base and into the sealer. The exposed area is approximately 1/4".
My idea to fix it was to sand the surrounding area with P800 (unless P1500 will provide adhesion?) then mist in some activated base with a touch-up gun, followed by a few coats of universal clear and with a separate gun spray SPI blending solvent as per the tech manual between each coat. Afterwards I would wet sand the repaired area with P1500 to match the surrounding hood area and continue with P2500, then 3000 & 5000 Triazact disks and then polish & glaze. This is the same process for the others panels that are now completed.
Do this method seem sound?
Thank You,
Mike
About the panel: it's a hood and this area is in a very visible part so the repair needs to be as perfect as it can get. It has 3 coats of PPG DBC butternut yellow base that has been activated. Followed up with 5 wet coats of SPI universal clear with 10% retarder added to 4 out of 5 coats. The base/clear is about a month old and has been curing in my garage at 80 degrees average. I blocked dry the clear with P400 initially to level (reduce chances of urethane wave) followed up with P800 wet then P1500 wet. I broke my own rule and was speaking to someone on the phone when I was attempting to wet sand out a spec with P1500 and went through the clear and base and into the sealer. The exposed area is approximately 1/4".
My idea to fix it was to sand the surrounding area with P800 (unless P1500 will provide adhesion?) then mist in some activated base with a touch-up gun, followed by a few coats of universal clear and with a separate gun spray SPI blending solvent as per the tech manual between each coat. Afterwards I would wet sand the repaired area with P1500 to match the surrounding hood area and continue with P2500, then 3000 & 5000 Triazact disks and then polish & glaze. This is the same process for the others panels that are now completed.
Do this method seem sound?
Thank You,
Mike