However , skateboarding is often prevented in these places through policy and by making structures less appealing for skating .
Skateboarders often use public , concrete and metal surfaces , such as ledges , stairs , or handrails to perform and practice tricks .
Skateboarding is often prevented in these places through policy and by making structures less appealing for skating .
Skateboarders often use public , concrete and metal surfaces , such as ledges , stairs , or handrails to perform and practice tricks .