I know it doesn't solve the actual issue when talking about other resources, but for metal this is a non-issue.
That is because you can just mint metal (or the other metals) into bullion, and then smelt the bullion into quality 255 metal. The actual quality of ore doesn't matter anymore because of that.
That is because you can just mint metal (or the other metals) into bullion, and then smelt the bullion into quality 255 metal. The actual quality of ore doesn't matter anymore because of that.