OK to join 2 acrylic sheets to each other for outdoor basketball backboard repair? 44" x 30". One sheet will be spray painted black and bonds w/other.

While the adhesive will bond most hard acrylic to itself and other substrates, the heat absorbing characteristics of a dark colored surface materials may create a condition that exceeds the product's recommend service temperature (~150 F.). Should this occur, you may see bubbling/blistering and loss of adhesion.