A method of repairing a rear cone segment erosion coating comprising: removing a portion of an existing fluoroelastomer erosion coating from the rear cone segment to form a repair area; forming a cured replacement erosion coating corresponding to the repair area, wherein the cured replacement erosion coating has a layer of fluoroelastomer and a layer of fibrous reinforcement; preparing the repair area and the cured replacement erosion coating for adhesion; locating the prepared cured replacement erosion coating on the prepared repair area; and adhering the prepared cured replacement erosion coating to the prepared repair area; wherein forming the cured replacement erosion coating comprises: providing a mold with a convex surface corresponding to the repair area; attaching an end of a barrier film to the convex mold surface wherein the one side of barrier film has a first surface, a second surface and a free end; placing a sheet of fibrous reinforcement on the mold surface wherein a first end of the fibrous reinforcement sheet is adjacent to the first surface of the one side of barrier film, a second end of the fibrous reinforcement 34 sheet is adjacent to the second surface of the one side of barrier film, and the free end of the one side of barrier film extends past the first end of the sheet of fibrous reinforcement; placing a sheet of uncured fluoroelastomer having a first end and a second end on the sheet of fibrous reinforcement 34 such that a joint between the first end and second end of the does not align with a joint between the first and second ends of the fibrous reinforcement 34 and the one side of barrier film is located between the ends of the sheet of the uncured fluoroelastomer; and curing the sheet of uncured fluoroelastomer. removing a portion of an existing fluoroelastomer erosion coating from the rear cone segment to form a repair area; forming a cured replacement erosion coating corresponding to the repair area, wherein the cured replacement erosion coating has a layer of fluoroelastomer and a layer of fibrous reinforcement; preparing the repair area and the cured replacement erosion coating for adhesion; locating the prepared cured replacement erosion coating on the prepared repair area; and adhering the prepared cured replacement erosion coating to the prepared repair area; wherein forming the cured replacement erosion coating comprises: providing a mold with a convex surface corresponding to the repair area; attaching an end of a barrier film to the convex mold surface wherein the one side of barrier film has a first surface, a second surface and a free end; placing a sheet of fibrous reinforcement on the mold surface wherein a first end of the fibrous reinforcement sheet is adjacent to the first surface of the one side of barrier film, a second end of the fibrous reinforcement 34 sheet is adjacent to the second surface of the one side of barrier film, and the free end of the one side of barrier film extends past the first end of the sheet of fibrous reinforcement; placing a sheet of uncured fluoroelastomer having a first end and a second end on the sheet of fibrous reinforcement 34 such that a joint between the first end and second end of the does not align with a joint between the first and second ends of the fibrous reinforcement 34 and the one side of barrier film is located between the ends of the sheet of the uncured fluoroelastomer; and curing the sheet of uncured fluoroelastomer. providing a mold with a convex surface corresponding to the repair area; attaching an end of a barrier film to the convex mold surface wherein the one side of barrier film has a first surface, a second surface and a free end; placing a sheet of fibrous reinforcement on the mold surface wherein a first end of the fibrous reinforcement sheet is adjacent to the first surface of the one side of barrier film, a second end of the fibrous reinforcement 34 sheet is adjacent to the second surface of the one side of barrier film, and the free end of the one side of barrier film extends past the first end of the sheet of fibrous reinforcement; placing a sheet of uncured fluoroelastomer having a first end and a second end on the sheet of fibrous reinforcement 34 such that a joint between the first end and second end of the does not align with a joint between the first and second ends of the fibrous reinforcement 34 and the one side of barrier film is located between the ends of the sheet of the uncured fluoroelastomer; and curing the sheet of uncured fluoroelastomer.