Three days later? I'm not quite sure I'm following you here. But you've got a GOOD point about the pores in the metal. We started using Kroil-Oil when I shot with a bunch of 1000 yard shooters a couple of years ago. You clean...and clean...and clean....until the patch is clean. Then wait an hour, run another patch with Kroil on it thru the bore and it comes out as if you had JUST fired the thing!
Yep three days.....clean it every day for three days after ya shoot a few hundred rounds.....more so the bore and chamber .
On that third day you'll see carbon deposits even.....
That was our SOP for duty weapons and it's just a habit that has stuck. Albeit a problem when I shoot every third day now .....:o)
I use the sonic dunk tanks for my 1911A1's......I just remove the grips, strip it and drop it in overnight.
Suprising what one misses when they "think" it's a done job. I have detail cleaned part yet when the little sonic cleaners have a shot at the process they seem to finds a bunch of carbon residue.....
Give it a try !