I am currently making a guitar and have slotted the neck into the body but there are some large gaps between the neck and body. Is there any foolproof way to disguise these gaps. I have been thinking of mixing glue with sawdust to fill the gaps but I am wanting more ideas.

Thanks for helping.

I am making a guitar and have slotted the neck into the body but there are some large gaps between the neck and body. Is there any foolproof way to disguise these gaps. I have been thinking of mixing glue with sawdust to fill the gaps but I am wanting more ideas.