JB Bore paste and mold lapping

[cheese1566]

Do I dare use JB Bore paste mixed with a little Kroil to lap an iron mold?

I just got a nice project mold that had some previous corrosion in the tip area so looking to "polish" and clean up the area.

I have always done the lapping of aluminum molds with Comet using the poured hexnut/bullet method.

[selmerfan]

I wouldn't be afraid to lap a mold with JB and Kroil. I've used it on bores for years, makes them shine like mirrors, I can't see it harming a mold.

[Doc Highwall]

Actually the JB would make a poor lapping compound but a great polishing compound.

[462]

I agree with Doc. For an iron mould, fine grit valve lapping compound is a much better choice.

[cheese1566]

I was looking more to clean it up and help the minor corrosion rather than increase diameter.

[Ben]

I've got my doubts that this would hurt your mold in any way :

http://castboolits.gunloads.com/showthread.php?t=47669

[jmsj]

cheese1566,
I have used JB bore paste to clean surface rust out of an iron mold before and it worked ok.
I also use it when "leementing" a Lee mold that is a little stubborn about dropping bullets.
Good luck, jmsj

[462]

I was looking more to clean it up and help the minor corrosion rather than increase diameter.



In that case, it'll work. Sorry for mis-understanding.

[cheese1566]

No problem!
I wasn't that clear in my askiing.

Just wondering if it would be too abrasive. I just bought a jar and have some Kroil coming this way next week.

[Love Life]

Mother's aluminum polish has worked very well on my iron molds for cleaning up cavities and for releasing boolits.

[selmerfan]

Sorry, I misused the term "lap" as well. I was thinking in terms of using it in the lee-menting process. For that is will work great, lapping takes lapping compound.