I'm using DPLF 90 (black) under K36 (gray) high builder primer on my -14. Last night, after shooting the elevator fairings, I noticed that I had a couple of spots where I sanded through the epoxy skim coat (West Systems) into the filler (microballons and epoxy).
If I'd sanded through the skim coat into fiberglass, I'd know what to do. Since I sanded into the microballons filler, I'm not sure what the result will be. There are no pinholes, the DPLF primer just appears to have a different finish (splotches) in a couple of areas where I sanded though the skim coat.
My question is, will the K36 high builder primer cover this error or do I need to sand off the DPLF primer and start over? My understanding is that DPLF is very difficult to sand.
I used Dan H's suggestion on using a roller to create an orange peel finish on the skim coat to act as a sanding guide....what a great idea! Apparently I just got a little too aggressive over a few inches on the filler. After a thorough examination before spraying the primer, I could not tell that I'd gone through the skim coat.
Fred
If I'd sanded through the skim coat into fiberglass, I'd know what to do. Since I sanded into the microballons filler, I'm not sure what the result will be. There are no pinholes, the DPLF primer just appears to have a different finish (splotches) in a couple of areas where I sanded though the skim coat.
My question is, will the K36 high builder primer cover this error or do I need to sand off the DPLF primer and start over? My understanding is that DPLF is very difficult to sand.
I used Dan H's suggestion on using a roller to create an orange peel finish on the skim coat to act as a sanding guide....what a great idea! Apparently I just got a little too aggressive over a few inches on the filler. After a thorough examination before spraying the primer, I could not tell that I'd gone through the skim coat.
Fred