[Scorch]

First off, just because you are a tinkerer does not make you a smith. Not trying to be negative, just be respectful of those who really are gunsmiths.

The barrels dismount from the receiver like any other O/U shotgun. The forearm is held in place by a spring latch. Remove the forearm and lift the barrels off the hinge pin. The stock draw bolt is reached by taking the butt pad off and using a long screwdriver to unscrew the draw bolt. Do not try to disassemble the lockwork, just spray it out with solvent and remove any grime and varnished oil with a brush. There is nothing in the lockwork you need to mess with, so don't. Put the buttstock back on and make sure it is tight. Punch the bores as you would any shotgun. Lightly lube the hinge pin and bearing surfaces before reassembly.

Be aware that any parts that get damaged are irreplaceable, so be very careful and don't get rough with it.