OpenWRT BackUp and Recovery

The BackUp and Recovery section of the OpenWRT LuCI GUI interface (System, Backup / Flash Firmware) is great. It even allows one to backup the MTD Partitions in the "Save mtdblock contents" section. But what about restoring the backup image that one makes? That's a bit nebulous.

dd if=OpenWrt.mtd6.bin of=/dev/mtd6 conv=noerror,sync status=progress