Do I need to paint all four pieces separately, or can I assemble then paint?

You can paint the pieces before or after installation — FRP handles both approaches. Painting before assembly gives you better coverage on hard-to-reach seams and undercuts. If you install first, mask carefully around mounting points and panel edges.

Will the side skirts interfere with my jack points?

Side skirts sit low along the rocker line. Check your vehicle's factory jack point location before final installation to confirm clearance. Most setups require no modification, but verify your specific vehicle's geometry.

What should I use to seal gaps between the bumpers and fenders?

A flexible gap filler or seam sealant rated for automotive paint systems works well on FRP edges. Apply after painting to prevent water from pooling at panel joints. Your paint supplier can recommend a compatible product for your chosen topcoat system.