Tier 1: Gloves, Belt, Boots, Small Donation.In the dialog option when upgrading your equipment, if you do not have enough money for the higher polishing fees, those items do not show up on the list. These upgrades will be at your current level PLUS one level.
This will allow you ONLY TWO special upgrades per Region. This will allow you to upgrade as many items as you wish to your current level, given you have enough gold. On the plus side, this allows for another set of equipment to be leveled up to your current level plus one level! Within each Region a character is only allowed to donate once at each available donation level. If you decide to donate in order to receive discounts, these are reset upon leaving your current region. Aubrey's fee for cleaning services vary by Region (e.g. GameplayAubrey provides polishing services for you active adventurers.