Lydia teaches you how to repair metal corner bead and fix dents or damage to 90-degree corners in drywall. She covers essential tips like scraping off paint before working, using the right mud products such as all-purpose or easy sand, and how to build up your corner with multiple coats for a smooth finish. Lydia also walks you through troubleshooting tricky situations like vinyl corner bead or large dents, showing you how to use screws or glue for a more secure repair. Whether you're a DIY enthusiast or just starting out in drywall repair, this easy-to-follow tutorial will help you restore your corner bead with professional results.