Access panels,Before applying wallpaper, the joints, putty, and paint surfaces should be properly coated. If not, it is likely that the final result will not meet the expectations. Specification: Material: Aluminum alloy frame + drywall panel Door opening method: single open/double open Size: Customized Frame color: Black/ White/ Silver Total frame thickness: 4.5 cm/1.8 in Outer width thickness: 1.2 cm/0.5 in Inner panel thickness: 3.3 cm/1.3 in Can it be painted? yes Feature: Fire resistant aluminium for safety Pre drilled holes for easy installation Recedes into walls/ ceilings/ floorssurfaces, blends with interiors Opens quickly for simple repairs/inspections Customizable with paint/wallpaper Works in homes and businesses Covers HVAC, pipes, wiring, attic passages Package List: 1 × access panel Installation Steps: (The only mounting parts are screws) Prepare installation materials Preliminarily position the door panel Use a level and other tools to ensure the door panel is level Drill holes in the corresponding positions with a power drill to prepare for securing the components Apply sealant or other adhesive materials for fixation Seal the gaps around with joint compound Apply fiberglass mesh to prevent cracking Apply joint compound and putty layer by layer Sand smooth and roll - apply two coats of paint Tips: In order to install the access panel accurately and make it more firmly, we suggest that you keep the width of 0.1 in-0.2 in on the four sides of the hole when cutting, and then carefully sand it with sandpaper,then let the access panel fill the hole with adhesive at last When installing the door, don't pre - cut the opening. Integrate the door with the framing and seal them together with gypsum board. Otherwise, a 0.8 inch gap may form Don't tear off the protective film until 45 days after the installation is compl