Rust spots after drilling/cutting bodywork

I need to get some of this as started to get some bubbling on the bonnet 😱 I did see a bonnet protector somewhere I need to get that too. I need lots of things for the van it never ends 😆
 
I always try to remove the swarf after cutting a hole in the roof or side of the van, but I never get it all. The remaining bits rapidly form rust spots on the surface of the paint and are difficult to remove. I recently found this stuff which is magic; spray it on and the rust spots turn purple, have a brew then wash it off and all spots have gone. Probably been around for years, but wish I had found it sooner
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gonna try after my car will be back from mechanic :D
 
For cutting thin metal sheet a Nibbler is much better than anything else. A pilot hole needs to be drilled first but plenty of grease on the drill shank grabs the swarf. The Nibbler (if set up right) should produce one long continuous piece of swarf, leaving virtually nothing on the paintwork.
 
For cutting thin metal sheet a Nibbler is much better than anything else. A pilot hole needs to be drilled first but plenty of grease on the drill shank grabs the swarf. The Nibbler (if set up right) should produce one long continuous piece of swarf, leaving virtually nothing on the paintwork.
And doesn't generate the heat of a jigsaw/grinder ....
 
For cutting thin metal sheet a Nibbler is much better than anything else. A pilot hole needs to be drilled first but plenty of grease on the drill shank grabs the swarf. The Nibbler (if set up right) should produce one long continuous piece of swarf, leaving virtually nothing on the paintwork.
I thought a nibbler left wee half moon shaped bits of metal all over the place?
 
That was why I always advocated using a Jigsaw and never a grinder to cut the many holes on mine Chris, I also took the sold plate off so never got swarf scratches just two lines from the blade guide which would be covered.

A problem with Jiggsaws as with a Nibbler is swarf ebering bodywork voids and rusting from within. Try to mask off from within if possible or use magnets to clear as much as possible after cutting….. Alf
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