Methods of enhancing adhesion

A method of enhancing adhesion between at least two surfaces, the method comprising:

• thermal spraying a reactive powdered surface preparation composition onto at least a portion of a first surface wherein the powdered surface preparation composition comprises a crosslinked adhesive that is at least partially decrosslinked during thermal spraying and the crosslinked adhesive prior to crosslinking comprises:
• at least one polymer;
• and
• at least one degradable crosslinker incorporated into the polymer, wherein the degradable crosslinker comprises:
• at least one energetically labile moiety;
• and
• at least two free radically polymerizable groups, wherein the degradable crosslinker is capable of fragmentation into at least two fragments upon activation by an external energy source and wherein at least two fragments are essentially free of free radicals and ethylenic unsaturations;
• and
• subsequently contacting at least a portion of a second surface of a nonpowdered material with a portion of the first surface having the powdered surface preparation composition thereon.