Good morning Flash

The transfer / decal is sandwiched between two sheets, a backing sheet which peels off first and then a top 'rubbing' sheet to apply the decal to the frame then can be removed.
Clean the frame surface with a grease remover, perhaps methelated spirits or a water soluable grease buster and dry completely.
Remove the backing paper, press firmly on the rubbing paper and then gently remove the rubbing paper. NICE NEW DECAL APPLIED. Mmmmmmmmmmmmm.
Roy.