Cleaning contamination in crevases for repairs

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I'm repairing a cracked and bent alumium skid plate off of a 4 wheeler for a customer. My problem is how to clean the alumium in the cracks and seams.
Reply:I believe you need to v-out all the cracks and then use acetone to clean any oils away..then weld....Of all the things I lost I miss my mind the most...I know just enough about everything to be dangerous......You cant cure stupid..only kill it...
Reply:True, this picture if from when I first got the skid plate. I guess my question would be more how to clean the horizontal seam in the picture.
Reply:is that meeting corner to corner or is there overlap the thickness of the plate? and are you talking that last 1/8th inch dark line in the corner or actually between the plates?..Of all the things I lost I miss my mind the most...I know just enough about everything to be dangerous......You cant cure stupid..only kill it...
Reply:There is an overlap. The under side is welded and the top is just a few stiches.
Reply:try to lay it in a tub or something to soak it in some alum  cleaner for a day
Reply:I think you are overthinking this. Clean it out with a grinder, just like you were back gouging a root pass, and then fill it up with weld.Ian TannerKawasaki KX450 and many other fine tools
Reply:I think your right. I just had the idea in my head that there would some chemical I didn't know about.
Reply:Die grinder with a carbide bit....zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Thanks everyone, I guess I just have to do it old fashion haha. I don't do much aluminium so I was hoping I'd find out about a miracle solution I never heard of.
Reply:Originally Posted by zapsterDie grinder with a carbide bit....zap!