I have painted numerous tractors using sandblasted parts and then priming with Expoxy primer that lays down great, and then immediately top coating. I have wanted to avoid high build primer and sanding for a whole bunch of reasons and I have been able to do so until now.
I am doing some fenders and panels that require some high build primer / and sanding.
I have laid some filler down and have several coats of primer on and have been trying to sand that down, all by hand. While its going OK it seems that the sand paper gets loaded up awful fast and is relative to how hard and how long I sand without blowing dust away. I have purchased several different grits of good paper from auto body store, and it wasn't cheap. It seems like I can only go a couple of stokes before needing to clean the dust and paper. If I go a little to much I wind up with loaded paper and need to throw it away.
I have let the primer cure for several days and am currently using 180 -220 to knock it down, and I intended to finish with 400.
I thought there should be a better way so i decided to try the 3M Sanding Sponges and 3M Scotchbrite pads it various grades and for me it seems to work much better than paper. The pads seem to last a lot longer than paper and hardly load up at all. Once I am done with the Sponge I go to the Maroon Scotch Brite for a finish surface. This seems to be a better way, but I don't see anyone recommending to do it that way. The pads are more expensive but I am not sure they will be in the long run with the amount of paper I was throwing away.
So the questions is : Am I doing something wrong that makes the Paper load up so quickly? Is there any reason not to use sanding sponges with Scotchbrite pads to finish ?
Thanks in advance
Alan
I am doing some fenders and panels that require some high build primer / and sanding.
I have laid some filler down and have several coats of primer on and have been trying to sand that down, all by hand. While its going OK it seems that the sand paper gets loaded up awful fast and is relative to how hard and how long I sand without blowing dust away. I have purchased several different grits of good paper from auto body store, and it wasn't cheap. It seems like I can only go a couple of stokes before needing to clean the dust and paper. If I go a little to much I wind up with loaded paper and need to throw it away.
I have let the primer cure for several days and am currently using 180 -220 to knock it down, and I intended to finish with 400.
I thought there should be a better way so i decided to try the 3M Sanding Sponges and 3M Scotchbrite pads it various grades and for me it seems to work much better than paper. The pads seem to last a lot longer than paper and hardly load up at all. Once I am done with the Sponge I go to the Maroon Scotch Brite for a finish surface. This seems to be a better way, but I don't see anyone recommending to do it that way. The pads are more expensive but I am not sure they will be in the long run with the amount of paper I was throwing away.
So the questions is : Am I doing something wrong that makes the Paper load up so quickly? Is there any reason not to use sanding sponges with Scotchbrite pads to finish ?
Thanks in advance
Alan