Here’s a small mod Buggi put together to bring Stainless Steel back to the upgrade path after Steel. Adds a new Steel Polish item craftable in the chemistry station. Now featuring Localization and crafting in bulk.
Also, to make it actually worth it, he made Stainless Steel blocks tougher, both in HP and explosive resistance. Those new explody zombies are brutal to a base.
Updated the mod to include localization and crafting in bulk. Thanks to bodysalvage for this work!
The forum topic of the mod is here.