quality-control/Assets/Scripts/Products/DefectMaterialVisualizer.cs

using System.Collections.Generic;
using UnityEngine;

public class DefectMaterialVisualizer : MonoBehaviour, IDefectVisualizer
{
    public MeshRenderer MeshRenderer;

    private List<DefectType> supportedDefects = new()
    {
        DefectType.Hex_MissingMaterial_1,
        DefectType.Hex_MissingMaterial_2,
        DefectType.Hex_MissingMaterial_3,
        DefectType.Hex_MissingMaterial_4,
        DefectType.Hex_MissingMaterial_5,
    };

    public void VisualizeDefect(DefectType defectType)
    {
        var materials = MeshRenderer.sharedMaterials;
        
        for (var i = 0; i < supportedDefects.Count; i++)
        {
            if (defectType.HasFlag(supportedDefects[i]))
            {
                materials[i + 1] = null;
            }
        }
        
        MeshRenderer.sharedMaterials = materials;
    }
}