Hi jigeye,

Ken and Campy's suggestions are what I use with new decals and it works fine. In your case with old fuel effected decals I have found that if you thoroughly clean the area with acetone and then cover the decal with a piece of laminating film (cut from a laminating pouch), about 5mm large than the decal. Iron the laminating film down over the existing decal and then seal the edges with clear nail polish makes for an almost invisible fix.

Set the temp on your iron by experimenting with a piece of scrap as different thicknesses of laminating film require different amounts of heat.

Good Luck,

Colin