Step 1 Carefully remove glass or plastic from both frames and set aside safely. Working on a drop sheet in a well-ventilated area, spray frames with primer and let dry. Next, spray with gold paint and let dry. If you cannot remove glass or plastic, cover with plastic sheet or newspaper and apply tape around edges, butted to frames, to protect from overspray.
Step 2 Carefully tear watercolour paper into pieces that will represent the size of the abstract shapes you want in your finished artworks. Place paper on reverse side of both sheets of glass or plastic and lay out as desired. Leave one part of each sheet of glass or plastic uncovered by paper.
Step 3 Spray uncovered areas with 2–3 thin coats of colour of choice. Let dry after each coat.
Step 4 Remove a piece of paper from each artwork and spray glass or plastic with 2–3 thin coats of next colour paint. Let dry after each coat.
Step 5 Repeat Step 4 as many times as required, changing colour of paint as desired, until all of glass or plastic is painted on both artworks.
Step 6 Return glass or plastic to frames (unless you were unable to remove it) and hang artworks as desired.