how to cut guards for flares on a torana?
copy the directions and advice of those who went before you!! 
(couldn't of done it to my liking/as easily without your help, ghmtorana-ee's. massive thankyou)
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marked area to be cut

(grew bigger balls and stopped fkn freaking out, and) started cutting

chopped lower line to expose under layer

and this is my gap (at the height of cut i chose)

removed side not needing work (other than being pinched together and welded)

cut so could easily bend to shape

this part is dual layered, recommend just barely cutting/nipping thru first layer and yanking off.

now ready for bashing with a hammer

and looks like this.
(will get off my ass and remove tyre so can actually bash/form better before welding)




very fortunately, seems my guess work for how much to leave to bend over was spot on.
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next, do the other wheel arch,
then, learn how to weld! using my new welder bought from ebay for $160 delivered.
(have a mate who says will teach/guide me)