Lapping a new barrell??

[HogginHank]

I have a few guns with custom barrels and now all about "breaking a barrel in" but I am amazed that I NEVER knew that all barrels weren't factory lapped

I have a couple Douglas Air Gauged barrels and a Hart barrell that I am pretty sure they are lapped before sent to the gunsmiths??

With that said I recently bought a 223 Youth Handi-Rifle for my 6 year old boy and I found some good info on a" Handi-Rifle" forum that talked about Lapping your barrell with some abrasives to take some of the sharp edges off of the grooves..

Any of you experienced professional or "At Home" gun smith folks recommend this on a new gun..If so what are some chemicals and methods for this..Thanks in advance..