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Penetrating question
Penetrol looks good for the first few months, then oxidizes with a
yellow cast. Best for gelcoat restoration is to wet sand off the oxidized surface with 2000 grit wet and dry followed by power buffing with a high speed autobody shop buffer with pure lambswool bonnets (1 bonnet per grit size). Polishing grits used in sequence 1000, 1300, 2000. Followup with an application of carnauba paste wax applied with water and hand rubbed into the pores, followed by a power buff. Process will usually restore gelocat to NEW condition if there is sufficient depth remaining, otherwise paint the sucker. Thbe above process is what is done to a NEW hull when its pulled from its mold to remove irregularities, hazes and blemishes. If you keep the gelcoat (new or restored) fully sealed with wax to prevent oxidation you wont have to restore it. BTW - stip any wax yearly with caustic to remove the oxidized wax which will promote oxidation of the gelcoat. There are several snake-oil treatments on the market that cover the oxidized gelcoat with a polymer ... and they look like hell in comparison to a buffed and restored hull. Skip Gundlach wrote: I've got a fiberglass boat which could use some luster restoration. I've heard reports, but none first-hand, about Penetrol. Some have said direct opposites - that it gives a great, deep, restoration, and that it doesn't work, and causes long-term dullness, but I don't recall any who had personally used it. If there are any here who have personally used Penetrol to restore fiberglass gelcoat luster, I'd be interested to know the results - were they good, bad or indifferent, and would you do it again/how long did it last/did it have negative long-term results, etc. In particular, any who have done so on glitter surfaces would be welcomed. Since I don't get here all that often, a direct response as well as to the group would be appreciated. myname at earthlink dot net is more reliable than the uga one.... Thanks. L8R Skip -- "And then again, when you sit at the helm of your little ship on a clear night, and gaze at the countless stars overhead, and realize that you are quite alone on a great, wide sea, it is apt to occur to you that in the general scheme of things you are merely an insignificant speck on the surface of the ocean; and are not nearly so important or as self-sufficient as you thought you were. Which is an exceedingly wholesome thought, and one that may effect a permanent change in your deportment that will be greatly appreciated by your friends."- James S. Pitkin |
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