diff --git a/src/PowderCoating.Application/Interfaces/ISeedDataService.cs b/src/PowderCoating.Application/Interfaces/ISeedDataService.cs
index d60169a..38486ce 100644
--- a/src/PowderCoating.Application/Interfaces/ISeedDataService.cs
+++ b/src/PowderCoating.Application/Interfaces/ISeedDataService.cs
@@ -48,6 +48,16 @@ public class RemoveSeedDataOptions
     public bool Bills { get; set; }
     public bool Expenses { get; set; }
     public bool Workers { get; set; }
+    public bool Vendors { get; set; }
+    public bool NamedOvens { get; set; }
+    public bool Appointments { get; set; }
+
+    /// <summary>
+    /// When true, all removal blocks skip fingerprint matching and delete by CompanyId only.
+    /// Use for demo resets where the goal is a full wipe regardless of which code version seeded
+    /// the data. Never set this on a real tenant company.
+    /// </summary>
+    public bool ForceRemoveAll { get; set; }
 }
 
 public class SeedDataResult
diff --git a/src/PowderCoating.Infrastructure/Services/SeedDataService.Remove.cs b/src/PowderCoating.Infrastructure/Services/SeedDataService.Remove.cs
index cf2c356..ca4f69a 100644
--- a/src/PowderCoating.Infrastructure/Services/SeedDataService.Remove.cs
+++ b/src/PowderCoating.Infrastructure/Services/SeedDataService.Remove.cs
@@ -123,11 +123,15 @@ public partial class SeedDataService
             // --- Customers (+ their jobs, quotes, and related items) ---
             if (options.Customers)
             {
-                var seededCustomerIds = await _context.Customers
-                    .IgnoreQueryFilters()
-                    .Where(c => c.CompanyId == companyId && SeededCustomerEmails.Contains(c.Email))
-                    .Select(c => c.Id)
-                    .ToListAsync();
+                // ForceRemoveAll: wipe every customer for the company (demo reset path).
+                // Normal mode: fingerprint-match by seeded email addresses (selective removal).
+                var seededCustomerIds = options.ForceRemoveAll
+                    ? await _context.Customers.IgnoreQueryFilters()
+                        .Where(c => c.CompanyId == companyId)
+                        .Select(c => c.Id).ToListAsync()
+                    : await _context.Customers.IgnoreQueryFilters()
+                        .Where(c => c.CompanyId == companyId && SeededCustomerEmails.Contains(c.Email))
+                        .Select(c => c.Id).ToListAsync();
 
                 if (seededCustomerIds.Any())
                 {
@@ -452,12 +456,81 @@ public partial class SeedDataService
                 }
             }
 
+            // --- Vendors ---
+            if (options.Vendors || options.ForceRemoveAll)
+            {
+                var vendors = await _context.Set<Core.Entities.Vendor>()
+                    .IgnoreQueryFilters()
+                    .Where(v => v.CompanyId == companyId)
+                    .ToListAsync();
+
+                if (vendors.Any())
+                {
+                    _context.Set<Core.Entities.Vendor>().RemoveRange(vendors);
+                    totalRemoved += vendors.Count;
+                    details.Add($"✓ Removed {vendors.Count} vendor(s)");
+                    await _context.SaveChangesAsync();
+                }
+                else
+                {
+                    details.Add("• No vendors found");
+                }
+            }
+
+            // --- Named Ovens (OvenCost) ---
+            if (options.NamedOvens || options.ForceRemoveAll)
+            {
+                var ovens = await _context.Set<Core.Entities.OvenCost>()
+                    .IgnoreQueryFilters()
+                    .Where(o => o.CompanyId == companyId)
+                    .ToListAsync();
+
+                if (ovens.Any())
+                {
+                    _context.Set<Core.Entities.OvenCost>().RemoveRange(ovens);
+                    totalRemoved += ovens.Count;
+                    details.Add($"✓ Removed {ovens.Count} named oven(s)");
+                    await _context.SaveChangesAsync();
+                }
+                else
+                {
+                    details.Add("• No named ovens found");
+                }
+            }
+
+            // --- Appointments ---
+            if (options.Appointments || options.ForceRemoveAll)
+            {
+                var appointments = await _context.Set<Core.Entities.Appointment>()
+                    .IgnoreQueryFilters()
+                    .Where(a => a.CompanyId == companyId)
+                    .ToListAsync();
+
+                if (appointments.Any())
+                {
+                    _context.Set<Core.Entities.Appointment>().RemoveRange(appointments);
+                    totalRemoved += appointments.Count;
+                    details.Add($"✓ Removed {appointments.Count} appointment(s)");
+                    await _context.SaveChangesAsync();
+                }
+                else
+                {
+                    details.Add("• No appointments found");
+                }
+            }
+
             // --- Shop Workers ---
             if (options.Workers)
             {
-                var workerUsers = await _userManager.Users
-                    .Where(u => SeededWorkerEmails.Contains(u.Email) && u.CompanyId == companyId)
-                    .ToListAsync();
+                // ForceRemoveAll: remove all non-admin company users (role = Worker/Employee).
+                // Normal mode: fingerprint-match by @pcldemo.com email domain.
+                var workerUsers = options.ForceRemoveAll
+                    ? await _userManager.Users
+                        .Where(u => u.CompanyId == companyId && u.CompanyRole == "Worker")
+                        .ToListAsync()
+                    : await _userManager.Users
+                        .Where(u => SeededWorkerEmails.Contains(u.Email) && u.CompanyId == companyId)
+                        .ToListAsync();
 
                 if (workerUsers.Any())
                 {
diff --git a/src/PowderCoating.Web/Controllers/SeedDataController.cs b/src/PowderCoating.Web/Controllers/SeedDataController.cs
index 0e88a5e..e178e21 100644
--- a/src/PowderCoating.Web/Controllers/SeedDataController.cs
+++ b/src/PowderCoating.Web/Controllers/SeedDataController.cs
@@ -125,7 +125,8 @@ public class SeedDataController : Controller
                 return RedirectToAction(nameof(Index));
             }
 
-            // Remove all seed data categories
+            // Full wipe — ForceRemoveAll bypasses fingerprint matching so stale seed data from
+            // previous code versions (different emails, renamed SKUs, etc.) is always cleared.
             var removeOptions = new RemoveSeedDataOptions
             {
                 Customers      = true,
@@ -137,6 +138,10 @@ public class SeedDataController : Controller
                 Bills          = true,
                 Expenses       = true,
                 Workers        = true,
+                Vendors        = true,
+                NamedOvens     = true,
+                Appointments   = true,
+                ForceRemoveAll = true,
             };
 
             var removeResult = await _seedDataService.RemoveSeedDataAsync(demo.Id, removeOptions);