On Thursday, March 24, 2016 at 4:20:54 PM UTC-4, vontresc wrote:
So after attending Uncle Hank's presentation at the convention I have been
inspired to sand out the crazing in my gel coat. I am planning on the
600-1000-1200-1500 wet sanding process and then buffing out the finish.

I understand the basics, but does anyone have a good primer on the process?

Thanks

Peter

Start with one grit finer than you think you need. Finer grit leaves less scratching to remove later.
If you guessed wrong it will take a lot of time to flatten the crazing. If so go down one step. I never go below 600 as it takes forever to get out scratches.
Except for edges and ends, we do it all with the orbital.
My sanding pattern is(remember my example where I dropped the mike?) is left to right as far as I can hold a consistent pattern- about 24 inches or so.. 2 traverses at the start, then shift about 1/2 inch on each pass. When all the way across, do the same in reverse. Finish off with one set of passes at 90 degrees with the same offset. Keep the surface wet.
Note where the end of your pattern is and set up again with enough offset to get uniform coverage.
A 1000 grit disc will go about 4 feet on a Std class wing and then not much is happening.
I block and finger sand leading edges and tips.
When crazing is flatted, do the same with 1500 on orbital.
Then 3000.
Buff.
Wear wet weather shoes.
UH