NFT5 wrote:PainterDave wrote:you must not use a mil gauge very often.
Well, there you go, my bad. My PTG measures in μm, not mils.
Seriously though, if you leave a visible smear of filler on the sides and at the bottom of the run then you're never actually sanding into the clear in those thinner areas until you get up to about P1500 and then all you do is take the filler off. Probably not reducing clear thickness as much as doing a full cut and buff.
Next time I get a run (should be sometime in 2022 ) I'll measure the thicknesses.
IMHO, the secret is a small, hard timber block, about 60x20mm and starting with P400. That knocks the run down with less rubbing and while the surrounding areas are still protected. If you use a rubber block, even a hard one, you do risk going through.
Sounds like you are qualified to pull it off, i believe you can do it.
make sure to repost that run in 2022