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Hi Marlin, Here's what I would do as far as the gas tank is concerned (assuming you used hardener): 1. Remove tank so it can be treated as an individual, separate piece. Alternatively it might be possible to mask off everything but the portions of the tank that show.
2. Sand entire tank lightly with 400 grit or Scotch-Brite
3. Reshoot entire tank For the other small areas, either the Preval or a brush can be used if the areas are on a part that cannot be readily removed for individual painting/repainting. Unfortunately, there probably will be some sort of demarcation line between the old and new that shows. With the Preval it would be caused by overspray. This can be eliminated by appropriate masking off of adjacent areas along existing visual break lines and minimized, but not eliminated, by careful use of hand rubbing compound (again assuming a hardener) after cure where masking is not appropriate. If using a brush for small areas, I don't think that brush marks would be a problem but think there would be a noticeable separation line between the old and new that shows - if there is no obvious visual break available, like an edge or joint or something. Depending on size and location of the areas, masking off along existing break lines and reshooting sections (after light sanding with 400 - or Scotch-Brite) might be an approach to consider. My tendency would be to reshoot sections if possible since I think that would result in the best appearance. I have not had any success in the past in trying to blend a spot repair so it is not noticeable. I don't even bother to try now. If it's important to me, I simply reshoot the part or masked off section. In the end, it depends on how visable the areas are, how good you want the repair to look and how much effort you want to expend.  Rod
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