Does 303 Aerospace Protectant always work on fiberglass?
Yes, 303 always works unless there is something on the surface keeping the 303 away from the fiberglass. This something can be a Teflon, silicone or polymer sealant or fresh wax. If the surface has been freshly waxed, there is no need to remove the wax. Instead, just wait a few weeks. Wax does not last long enough to warrant the effort required to remove it. Only about 2% of the time is prebuffing (compounding) necessary prior to using 303. When compounding is required to remove the heavy layer of accumulated oxidation, be sure to use a rubbing compound that does not leave a coating or sealant. Use one containing only the finest abrasive.
