Coating Blind Small ID

[Tchuang]

Hello,

I have been trying to coat a small blind hole around .100 in diameter. I have been trying to coat a ceramic and near the bottom of the hole there always seems to be a patch that does not get coated. Does anyone have any ideas or experience with coating small blind ID. Thank you so much for your time

 

[mk3223]

To paint the hole internal or to plug the hole with ceramic coating?
How about to block the hole with a plug?

 

[Compositepro]

There is probably an air bubble trapped in the hole. Use a toothpick, stick it in the hole and stir it around. It would be helpful if you described what you are doing now that is unsuccessful. Is your coating a wet slurry? How deep is the hole?