consider cleaning or completely replacing the pavers and consider replacing them completely. However, cleaning the pavers is not a guarantee of a clean and attractive finish. On the other hand, completely replacing the pavers will be expensive.
There are some who seal pavers by using a wax sealer to shield them from damage or staining. But, the pavers already have staining so sealing cannot cover the marks. Paver dying makes dull pavers more attractive. Pavers may become stained with time. Dying allows different colored pavers show some color while those that are clear get a new hue that makes them blend nicely. sljrrsr3gf.