Unusual, though wasn't the use of resin for other purposes normal in mummification? Not for dehydrating the body, but instead in the linens that wrapped? I wonder what type of resin they used, and if perhaps the natron salts themselves became too expensive or hard to obtain. I do think I read that Roman mummified bodies were found with resin, perhaps it was thought of as a cheaper alternative and even an innovation (not knowing that it would not perform the job as well).

Also, were there any normal burials found for the commoners? I wonder what they did with their poor or even working classes. Perhaps mass burial mounds? It is doubtful (I'd imagine) that they would have incinerated/cremated the bodies, yet none have turned up that I know of. I suspect I simply am not aware of normal burial finds in ancient Egypt, not that there weren't any!

I found an interesting link when searching for information of resin-impregnated mummification in other cultures to compare, though I turned up empty on that account. Still, this looks to be a good page to bookmark imo: BLEE! History: Mummification. I am still looking for some sort of timeline of mummification in ancient Egypt, but have turned up empty handed thus far.