Brilliant guide Salem & thanks.  One minor improvement that I would suggest is to 'fix' the metal before you apply the filler by applying a sacrificial primer.  You can use a zinc oxide, or red oxide primer for this, but there used to be a product called Trustan (not sure whether it is still available) that was even better.  Trustan is a thin liquid, rather than a paint & combines with any traces of rust remaining to form an inert black surface.  Any trace of rust remaining under the repair will eventually become active again, but Trustan minimises this.  [It was once used to preserve the remains of a submarine after it was recovered from the sea bed.]

Good point [email protected] i forgot to mention that, i did say a good quality automotive filler/primer though which will contain an inhibiting agent.
On non penetrative repairs such as this complete removal of the oxidised metal will normally surfice if used in conjunction with a quality primer, penetration corrosion however would indeed benefit from a separate inhibitor unless you are going to cut out the corroded area.
I'll add your point to the guide 

s

If ok with you mate, I'll leave it here till you're completely finished, then will reward shop credits and move to FAQ's afterwards.  Keep up the good work, more guides comin?

more guides comin?

I've kind of got an idea for the next one.

S

top guide m8, sadly mine are f**ked and need the bodyshop!! 

Thats kind of the idea of the guide, its nice to be able to repair stone chips yourself but if you know you have a problem area, then at least you can deal with it and make a reasonable job  until funds are there to get a proper paint repair.


s

gud link,well helpfull,got all da gear,try it 2moro ta