Roadster’s fabric top - to remove deposits from a roadster’s fabric top use a (non-ammonia) type glass cleaner.
Do not use Bug & Tar remover as they are formulated with strong hydrocarbon-based (Aliphatic) solvents that will deteriorate the water repellent coating.
Alternative product- this product will remove it without damage to both vinyl and cloth. It will not harm the tops water repellence. Poop-Off Bird Poop Remover is a non-toxic, biodegradable, active enzyme formula that removes droppings and residues composed of all types of avian diets including, seeds, fruit, nuts, meat, vegetables, nectar, bugs and grains. Originally a marine product, it will not harm the tops water repellence Product specific - Poop-Off Bird Poop Remover- properautocare