Bob P. wrote: > "I strongly recommend spraying a light coat of black primer, before you start > filling, Even thou this step is not absolutely necessary it is very helpful > in guiding where to direct more sanding and when to change to finer sandpaper > grade. The filler becomes translucent as it gets thinner and the black color > starts showing through as dark spots indicating you are getting close to the > skin surface.""
That's called "guide coating", and it's common practice in the auto body business as well. Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net -------------------------------------------------------------- ----- Original Message ----- From: <[email protected]> To: <[email protected]> Sent: Saturday, October 28, 2006 3:05 PM Subject: KR> finish work > from "finishing a composite airplane" > > > > "I strongly recommend spraying a light coat of black primer, before you start > filling, Even thou this step is not absolutely necessary it is very helpful > in guiding where to direct more sanding and when to change to finer sandpaper > grade. The filler becomes translucent as it gets thinner and the black color > starts showing through as dark spots indicating you are getting close to the > skin surface."" > > > I mix blue pthalate dye with my filler for the same reason. I question the > idea of having primer in the middle of layers of epoxy. Probably very minor. > Bob P. > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to [email protected] > please see other KRnet info at http://www.krnet.org/info.html >
