A cautionary note
With most of these various fibreglass restoring products containing silicon, teflon or whatever, there are ramifications from its use.
If the possibility of a paint job is absolutely not in the future for you, then by all means wipe and shine away. If, however, you hope to restore your faded beauty with a good LPU paint one day you will rue the day you used products like Penetrol.
Once used Penetrol repeatedly on a faded red Ranger 28, with amazing (short term) results. A couple of years later it took an extra several hundred dollars of special solvents and HOURS of wiping down to remove the deeply imbedded product so that the paint would stick.
So if you really want to spiff things up, repaint. It's not that difficult, even for an amateur, to put on a decent job with reasonable equipment, especially if the boat has not been previously painted or treated. The biggest issue with the LPU (two-part) paints are the solvent fumes, VERY important to have adequate ventilation and protection.