Step 1 Line mat or work surface with baking paper. Remove plasticine from package, place on top of paper and use hands to shape it into a 2cm-thick rectangle, large enough to mould 2 raindrop shapes side by side.
Step 2 Press head of ladle into plasticine to create 2 impressions. Use fingers to carefully refine raindrop shapes and smooth over any cracks.
Tip If you have plenty of plasticine, you can create multiple moulds to speed up the making process.
Step 3 Prepare plaster of Paris, following directions on package. As a guide, in your mixing bowl or jug, add 2 parts dry plaster mix to 1.5 parts water (do not add water to plaster). Only mix enough plaster to fill your moulds. Using paddle or spoon, mix plaster to a stiff, creamy consistency.
STEP 4 Carefully pour plaster into plasticine moulds, using paddle or spoon to assist a controlled pour. Plaster will self-level in moulds or, if required, you can settle it in place with a few gentle pats, using back of paddle or spoon.
Step 5 Leave plaster to set (usually about 20 minutes). Gently remove raindrop shapes from moulds and set aside to fully dry, usually overnight.
Step 6 Repeat process to make as many raindrop shapes as desired. Lay raindrops on a large drop sheet in a well-ventilated spot, ready to be primed and painted.
Step 7 As plaster is so porous, you need to prime it before applying your topcoat. Use a paintbrush to apply a thin coat of PVA or use a spray product (such as Dulux Duramax undercoat). Ensure you coat face of each raindrop, let it dry, then flip over and coat back, too. Let dry
Step 8 Flip raindrops back over, then spray fronts with 2-3 light coats of paint. Let dry between coats. If you have leftover paint, flip raindrops over again and spray backs with 1-2 light coats. Let dry after each coat.
Step 9 Hang your raindrops on wall using self-adhesive picture hanging strips.