How to assign separate material to separate mesh i have the base mesh and with the bool tool addon i have some difference, slice operation and it created separate mesh. When i try to give different material to the mesh. it gives the material complete model. if i delete the material from particular mesh it delete complete material from all the mesh. I dont want to apply all the boolean operation. How to give material to separate mesh.
Demo file

Video
This is what i did so far
https://imgur.com/a/t1RpCvR
Actually your objects are linked-duplications, it doesn't look like because you gave them different booleans. So any modification on one of them (material or mesh) will be replicated on the other. If you want to keep their mesh linked but want to have separate materials, choose Object instead of Data in the Material panel:

If you want to completely separate them, go in the Object menu &gt; Relations &gt; Make Single User &gt; Object &amp; Data.