On May 24, 6:31*am, wrote:
On May 21, 7:19*pm, "Sam Zimmerman" wrote:





"JJ Sinclair" wrote in message

....
On May 20, 3:32 pm, Brad wrote:

I'm looking at my shiny black carbon wings and other parts and getting
ready to start sanding to prep for spraying on primer.

Question: what grade of sand paper do I use to break the glaze and
give tooth without removing precious material..................

and..............what to use to remove sanding dust,
etc...........prior to spraying primer.

it's getting closer!

thanks,
Brad

Hi Brad,
I'd sand with 80 grit (dry) on an 18" air-board, if you have one or an
18" hand board with 45 left/45 right action with the board held
parallel to span.
I'd put on a mask, turn on the fans and blow off the surface before
priming.
I use PCL Polyprimer (907 white) catilized with 2% MEKP.
Hope this helps,
JJ
what's an air-board, JJ??

Blow out really well so that Mr Pinhole is fully exposed on first fill
pass. You don't want to bridge over dust filled holes. They will bite
you in the ass. When they show up, squegee in spot fill before doing
your first sanding. With luck, youll get 90% on first cycle- then 90%
on second.
Good luck
UH

yup, there are lot's of pinholes................I will do my best to
prep properly for them. plan is to spray primer/filler, then make up a
light slurry of primer/filler/micro and squeegee that onto the wing
after the first pass has tacked up.

Brad