And a lap-lap here and a lap-lap there

[FElony]

It seems lapping compound comes in 180-320-400-600-800 grits. To just freshen up a used head, which one is preferable? Or maybe two-step? Thanks.

[shady]

I use Permatex 800-36. I have no idea what grit it is, but it makes short work of the job. I chuck the valve in a reversible drill to speed things along. My lap dog approves.

[FElony]

The Tech Data Sheet for that Permatex says that it contains various special grits, so I guess that means its a one size fits all. I was going to order some the other day when I ran across this and had the predictable brain meltdown. I've been studying auto body and paint, so the idea of using progressive grits kicked in. Argh.

https://www.ebay.com/sch/m.html?_odkw=lapping&_ssn=e-zbore_motorsports&_osacat=0&_from=R40&_trksid=p2046732.m570.l1313.TR1.TRC0.A0.H0.Xclover+lapping.TRS0&_nkw=clover+lapping&_sacat=0

[Falcon67]

It's...gray.  And crunchy, like extra gritty toothpaste.  I'll go look at the tube.

EDIT - Permatex 80037.  It says "Made for the Professional".  Therefore, eye er a professional.