Will moth balls get rid of wasps. I would spray the hole with wasp spray put in some moth balls wasps do not like the smell of moth balls and then seal it. There is anecdotal evidence that moth balls do keep wasps away. Killing them this way releases a pheromone signaling the other wasps that danger is near and that they need to attack. To get rid of hornets use wasp killer spray that can kill them on contact.
Does blue paint repel wasps and insects. I would do it in the evening when the wasps are not as active. The trailer is another issue and havent figured that out yet. Here is a smart way to utilize them to drive away large numbers of ground bees without calling in a pest control company.
Keep wasps away by using traditional clip on wasp repellents and creating deterrents with specific scents and decoys. Using moth balls to drive away ground bees. As with essential oils wasps hate mothballs. I second the mothballs as maintenence.
This is a quick inexpensive and virtually effortless way to prevent wasps from buzzing around your shed and yard. Some wasphornet spray is a good intermediate step but it is amazing what moth balls will do for keeping wasps and yellow jackets out of the boat. Wasps do not like certain smells and they choose to stay clear when the smells are used as alternative repellents. To keep them from the immediate area you can use mothballs.
Moth balls have been successfully used to repel bees wasps and several other insects. Mothballs contain a strong pesticide that drives away and kills many insects including bees. The moth balls do not usually kill them however. By the way mothballs also work well with squirrels racoons skunks etc for winter storage.
Before you begin taking any steps to get rid of yellow jackets it is vital to know that you should never squish a wasp.