Railing p. pr. & vb. n. : of Rail

Railing a. : Expressing reproach; insulting.

Railing n. : A barrier made of a rail or of rails.

Railing n. : Rails in general; also, material for making rails.

Example:
How should I paint an old indoor wrought iron Railing?

Taxonomy
Trex, Railing Design, Trex Deck, Artisan Series, colors, Trex Decking, Designer Series, Trex Company, styles and shapes, deck, design possibilities, ADA Compliant, Handrail, combines, Design Ideas, hand-in-hand, working as a team, outdoor experience.

Defination from the web:
railing brings more colors, styles and shapes to a deck's overall look. Opening up even more design possibilities. ... Delivering the clean look of painted wood and a contemporary glass paneling option, Trex Artisan Series Railing® combines beauty and performance with ease. ...