I couldnt find any search results that provide specific information about Lush shaving cream. However, based on the search results, I can provide some general information about Lush products and ingredients.

Lush is a company that produces self-preserving products, which means that they dont require any synthetic preservatives to keep them fresh. The company uses a combination of natural materials like clay, salts, and sugars to reduce the amount of water that microbes are able to access, and solid, naked products have a minimal water content which means they don’t need added preservatives.

The search results also mention some ingredients that are used in Lush products, such as biodegradable 1,3-propanediol and a mixture of tetrapeptide and tripeptide. However, its unclear whether these ingredients are used in Lush shaving cream specifically.

Without more specific information about Lush shaving cream, its difficult to provide a detailed list of positive and negative aspects of the product. However, based on the general information about Lush products, its possible to say that some potential positives of Lush shaving cream could include:

• Being self-preserving, which means that it doesnt contain synthetic preservatives that some people may want to avoid.
• Potentially containing natural ingredients that are effective at reducing the growth of microbes.

Some potential negatives of Lush shaving cream could include:

• Without specific information about the ingredients in Lush shaving cream, its difficult to say whether there are any specific ingredients that some people may want to avoid.
• Some people may prefer shaving creams that contain synthetic preservatives to ensure that they last longer.

Overall, without more specific information about Lush shaving cream, its difficult to provide a comprehensive list of ingredients or materials used in the product, as well as a detailed list of positive and negative aspects of the product.