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The show you are looking for is Junk Brothers! It was an HGTV show where two aggressively Canadian brothers would go around picking large items from the curb on trash day, completely re-fabricate them into something else (an old piano into an ottoman, an electric stove into a BBQ grill) return the new item to where they found it, ring the doorbell, and then run away.
They had an adorable shop dog that had special ear protection and welding glasses.
It sadly only ran for two seasons, and I've had almost no luck tracking it down online.
Thank you very much. i have been trying to find this show for awhile now.
All i remember is some guy and his friend drive around and take people furniture/trash they threw out. they then upgrade said furniture/trash and return it to said person who threw it out.