Anyone use sanding guides to sand their hot or gloss coats?
I thought I saw a demo (Cleanline’s DVD?) or it mentioned once about applying chalk or marker over a base coat before sanding to a final flat surface to highlight the high and low spots.
Since I switched to these Mirca sanding screens I’ve been watching how they fair these base coats on autobody work and they apply this powdery sanding guide over the surface prior to sanding and after each grit they apply the guide again to highlight the scratches and imperfections.
Anyone doing this with either epoxy or Polyester?
and if so what are you using?
I’m about to buy a can of the 3M or Mirka guide powder but was wondering if this doesn’t apply to Surfboard resin sanding
Also what’s the most common sanding schedule start to finish for epoxy versus polyester for machine (7" disk) sanding?
do you start at 60/80 for epoxy and finish at 320
or do you start at 100 and finish at 220
is it 100-120-150-180-220?
or
80-100-120-150-220?
or
100-150-220-320?
I mean where can you skip grits and where can’t you to offset the lower grit scratches
some wood/composite surface workers sand up to 12000 and beyond before applying a final coat
do those schedules differ depending on the size and types of sanders you use
like what if it’s a 5" RO versus a 7" disk?
sorry I’ve been out of action for years now and trying to get started again
got allot of sanding and reglassing to do to clean up around here
need to take a sanding class again
where’s that ronald patterson guy - my hero