Paint recovery and cleaning trolley (3, 33) for an apparatus for applying paint said apparatus being provided with a conveying belt for conveying pieces to be painted, comprising: - A paint recovery subunit, in its turn comprising: - A reverse roller in contact with the lower return section of said conveying belt, which in use recovers paint from the belt, - A first doctor blade tangentially placed with respect to said reverse roller for all its length, to allow the accumulation of a solvent and wetting said reverse roller; - A second doctor blade scraping the reverse roller so recovering paint; - A third doctor blade scraping the lower return section of said conveying belt, - At least one nozzle for supplying a solvent compatible with the paint in use, - A hopper collecting said solvent, placed under said reverse roller, - A paint collecting reservoir, - A cleaning subunit, in its turn comprising: - A reverse roller in contact with the lower return section of the conveying belt, which in use recovers paint from the belt, - A fourth doctor blade tangentially placed with respect to said reverse roller for all its length to allow the accumulation of a solvent and wetting said reverse roller, - A fifth doctor blade scraping the lower return section of said conveying belt, - At least a nozzle for supplying a solvent, - A hopper collecting said solvent, placed under said reverse roller, - A solvent collecting reservoir, wherein in each subunit (21, 22) said components (19, 11, 10, 2; 29, 211, 210, 2) form a closed chamber having the shape of a triangular prism, of which said components (19, 11, 10, 2; 29, 211, 210, 2) represent the rectangular faces, said chamber containing said solvent, which slowly drips from the triangular faces of said chamber into a respective collecting hopper (12, 212); characterised in that there are provided three positions of the trolley (3, 33) with respect to the apparatus for applying paint: - Operative position, wherein said trolley is totally inserted under said conveying belt, and the paint recovery subunit and cleaning subunits are lifted so that they are in contact with the lower return section of said conveying belt; - Inactive inserted position, wherein said trolley is totally inserted under said conveying belt, but the paint recovery subunit and cleaning subunit are lowered so that they are not in contact with the lower return section of said conveying belt; - Lateral extracted position, wherein said trolley is totally extracted from the apparatus for applying paint. - A paint recovery subunit, in its turn comprising: - A reverse roller in contact with the lower return section of said conveying belt, which in use recovers paint from the belt, - A first doctor blade tangentially placed with respect to said reverse roller for all its length, to allow the accumulation of a solvent and wetting said reverse roller; - A second doctor blade scraping the reverse roller so recovering paint; - A third doctor blade scraping the lower return section of said conveying belt, - At least one nozzle for supplying a solvent compatible with the paint in use, - A hopper collecting said solvent, placed under said reverse roller, - A paint collecting reservoir, - A reverse roller in contact with the lower return section of said conveying belt, which in use recovers paint from the belt, - A first doctor blade tangentially placed with respect to said reverse roller for all its length, to allow the accumulation of a solvent and wetting said reverse roller; - A second doctor blade scraping the reverse roller so recovering paint; - A third doctor blade scraping the lower return section of said conveying belt, - At least one nozzle for supplying a solvent compatible with the paint in use, - A hopper collecting said solvent, placed under said reverse roller, - A paint collecting reservoir, - A cleaning subunit, in its turn comprising: - A reverse roller in contact with the lower return section of the conveying belt, which in use recovers paint from the belt, - A fourth doctor blade tangentially placed with respect to said reverse roller for all its length to allow the accumulation of a solvent and wetting said reverse roller, - A fifth doctor blade scraping the lower return section of said conveying belt, - At least a nozzle for supplying a solvent, - A hopper collecting said solvent, placed under said reverse roller, - A solvent collecting reservoir, - A reverse roller in contact with the lower return section of the conveying belt, which in use recovers paint from the belt, - A fourth doctor blade tangentially placed with respect to said reverse roller for all its length to allow the accumulation of a solvent and wetting said reverse roller, - A fifth doctor blade scraping the lower return section of said conveying belt, - At least a nozzle for supplying a solvent, - A hopper collecting said solvent, placed under said reverse roller, - A solvent collecting reservoir, - Operative position, wherein said trolley is totally inserted under said conveying belt, and the paint recovery subunit and cleaning subunits are lifted so that they are in contact with the lower return section of said conveying belt; - Inactive inserted position, wherein said trolley is totally inserted under said conveying belt, but the paint recovery subunit and cleaning subunit are lowered so that they are not in contact with the lower return section of said conveying belt; - Lateral extracted position, wherein said trolley is totally extracted from the apparatus for applying paint.