another question - dry guide coat removal?

[julianf]

This is hypothetical - ive never used it, nor do i own any, just reading on it -


Say ive got a job in filler, and i want to make sure its good before i apply paint, there are a number of dry guide coat systems (3m / mirka etc) that seem to be, basically, rubbing carbon powder onto the job.

In an ideal world, this would then be blocked so as to get down to the low points and remove all the guide coat.


But...

What happens if there is a low spot, maybe a deep pinhole, where you cant block off the guide? Wont the carbon layer stop subsequent adhesion of filler? I'm guessing not, but i don't really understand why not? Does a dust off with compressed air just easily blow it all away?

Thank you.

 

[MetalMonkey]

I tend to just use a bit of black spray paint.

 

[500e]

All ways used a must coat but willing to learn

 

[norsa]

Im assuming it's formulated to resist reaction. I use the 3M a lot and have never had a reaction, put it that way.
Nick

 

[barracuda816]

As above. Flat it back removes most of it. Any low points should be filled with a bit of dolphin glaze or similar after wiping with panel wipe. I think that gets rid of all or most of it. But never been too bothered removing every last bit and never had a problem.

 

[steveo3002]

Never had an issue with bits remaining, dust of aerosol is just as good