Do I need to paint each piece separately or can I assemble first?

Paint each panel individually before final assembly. This ensures even coverage, cleaner seams, and easier touch-up down the road. Assembled panels are harder to access with a spray gun and result in visible primer lines at the edges.

What prep work does the FRP need before painting?

Sand the entire surface with fine-grit sandpaper to break the glossy primer coat and improve paint adhesion. Wipe clean with a tack cloth to remove dust, then apply your chosen primer and topcoat. Proper surface prep prevents paint peeling and orange-peel texture.

Are there any gaps between the four pieces that need filler tape?

Gap closure depends on your mounting setup and how tightly you fit each panel to the vehicle body. Before you buy seam tape, dry-fit all four pieces and check fitment along the rocker line and bumper transitions. Many builders use flexible gap fillers or vinyl trim pieces for a finished look, but it's not mandatory.