Dinosaur egg preparation

[Daze]

I purchased this Dinosaur egg and now I want to prep it a little. I don't have an airscribe, is there another way to remove the thin layer of matrix without damaging the eggshell or shell structure? 

 

 

[hadrosauridae]

You dont want to use an air scribe on that anyway, its already had the bulk of matrix removed.  That needs micro air abrasion for detail cleaning.  I dont know of anything that could do the same thing.  Other methods are likely to damage the shell surface..

[rocket]

tried a similar (same size) with brass brush to check if it works, does not... Micro air abrasion works perfekt, or you take a needle, a microskope and some days off. Possible to remove the matrix with fine needles

[DLB]

Air abrasive baking soda I've done it before on a raptor egg works great 

[jpc]

I have also cleaned one with bicarb in the ole sandblaster.  Worked well, but every specimen is different.  The one I did was not one of these big round ones.  

[snolly50]

Without an air abrasion rig, this tedious approach may be an option...