Abstract: An upgrade kit for an original roll-bar of a historic single-seater car, comprising an additional roll-bar with the shape of an inverted U or V and identifying second two ends operatively lower, and wherein each of said second two ends is adapted to be associated with first two ends of said original roll-bar by means of reversible connection means and at least one additional bracing rod adapted to be connected between a vertex of said additional roll-bar and said frame or an engine block of said historic single-seater car; the additional roll-bar being operatively superimposed to said original roll-bar.

Abstract: Methods for restoring at least one portion of a body of a valuable historic vehicle generally includes stripping the body portion to clean and roughen a metal surface thereof, wherein the boxy portion is formed of a metal and has a thickness of less than 4 tenths of a millimeter. Stripping includes solvent removal of a paint layer on the metal surface of the body portion followed by corundum blasting to roughen the metal surface. A metal layer is deposited onto the roughened surface by hurling metal particles against the body portion so that they remain embedded therein. Depositing the metal includes hurling metal particles including an anchoring agent to the cleaned and roughened metal surface followed by hurling metal particles including a metal that is similar in composition to the metal body portion. The anchoring agent can be an aluminum alloy.

Abstract: An upgrade kit for an original roll-bar of a historic single-seater car, comprising an additional roll-bar with the shape of an inverted U or V and identifying second two ends operatively lower, and wherein each of said second two ends is adapted to be associated with first two ends of said original roll-bar by means of reversible connection means and at least one additional bracing rod adapted to be connected between a vertex of said additional roll-bar and said frame or an engine block of said historic single-seater car; the additional roll-bar being operatively superimposed to said original roll-bar.

Abstract: Method for restoring at least one portion of a body of a valuable historic vehicle comprising the following successive steps: stripping said body portion, depositing a metal layer by hurling metal particles against said body portion so that they remain embedded therein.