If you find lumps in a can of paint that you need, you can "push" them out. Cut out a circle from a piece of wire screen slightly smaller than the can's inside circumference. Put the screen circle on the surface of the paint. With a little help it will sink to the bottom of the can, taking the lumps with it. Another way to salvage lumpy paint is to strain it through an old nylon stocking.
The National Association of Attorneys General lists home-improvement scams as one of the top-ten consumer problems. The most important thing to remember to have a written, signed and properly executed contract before any work is begun on your home or property. In particular, make sure the following information is contained in the contract: A complete description of the work to be done and the materials to be used; A provision requiring written approval for ANY changes; A statement that explains the builder’s or contractor’s guarantee on the work that he or she will perform; A starting date and a completion date; A complete description of the cost of the job, full disclosure of the payment terms, and the financing costs; Your signature and the contractor’s signature.