keeps fading

[3bvert]

black car. sat for 2 years, original paint. hood was the worst

went through all the steps listed in the DIY info on the forum. looked good for a week or two then faded flat again.so.........

washed, diamond cut with a buffer,worked my way up to swirl remover, clayed, sealed with mirror glaze, two coats of carnubooooo wax

3 weeks later the hood looks like flat black again, the rest of the car, including trunk still shine great

one person I talked to said it had likely been resprayed and not sealed, he said repaint
another person said sand it down, buff it out
another said to sand it dwon, clear coat it , then wax it out
( none of these guys are professional body guys)

the car has no evidence of being in a wreck, all the fenders and doors have the matching stickers with serial number. the hood however only has a sticker that says DOT BMW. so one of the guys says its not a bmw hood but a aftermarket hood and had a poor paint on it ( person #1)

any ideas

[e30rapidic]

sounds like aftermarket if it has a DOT sticker on it. May want to repaint it.

My 87 zinno cabrio still has the orginal paint, it shows fade after a few months but always polishes up nicely.

[Cobra Jet]

DOT BMW sticker or decal = genuine BMW replacement crash sheet metal. ALL genuine BMW replacement sheet metal will have that decal affixed to the sheet metal panel where an original VIN decal would have been affixed. The DOT labels are the same size of the original VIN decal. The same holds true for exterior replacement urethane panels/parts.

From what I understand, if any BMW is fixed by a body shop, only genuine BMW replacement panels are used (exterior sheet metal and urethane parts such as bumper covers, etc) - this is one reason why the cost to repair a wrecked or damaged BMW is costly.

My prior M3 was bumped ever so slightly in the rear, which caused some damage to the bumper cover & associated parts only (no sheet metal damages). When it was repaired by the body shop, every single piece used was all genuine BMW replacement parts, including the rear bumper cover and the lower valance to it. The body shop stated every BMW is always repaired as such - and that BMW does not deal w/ any overseas (Asian) reproduction parts (if available) when it comes to fixing wrecked vehicles. This is actually very good, because at least you know the parts are the exact same quality as the originals and not inferior, cheapo, poor fitting parts.

So, at some point, your hood was replaced w/ a BMW crash panel - for what reason, who knows. The original hood could have been dented by something falling on it, the front of the car could have been involved in a very minor collision, etc. Whomever did the paint work did shoddy work or did not prep/paint/cure the hood properly. The only real fix would be to sand it down, respray and reclear it.