DIY respray prep

ok its been a good few years since i have removed rust and prepped for paint! ive totaly forgot the grades of paper :/

what grades of sand paper do i use to start and then finish with?

what filler and primer would you recomend.

from memory are these steps correct

• sand down ( remove rust )
• sand down with fine grade
• apply filler
• sand down with fine grade
• apply primer
• sand down with a fine grade?

and then take to a body shop to spray.

You haven't said what you intend to use to rub it down with i.e. DA, angle grinder or other. Plus is it only surface rust or eaten etc

probably be a drill with a pad on, and i believe it surface rust but until i start i wont know

Remove rust etc, with anything that you feel will make the job easier, make your repairs and apply filler you'll be fine up to this part.
Sanding filler 80g working up to 240g paper
Flatting primer 400g working up to 800g as above
Use a guide coat (black aerosol) dusted on (really really light) to show the low spots in the primer while rubbing down. These will appear to have black on them whereas the high spots will have been rubbed away, aim to be rid of all signs of guide coat and make sure you use a flat rubbing block not just your hands!
That's pretty much it if you plan to take to a painter to finish. If you feel after your first pass with guide coat there is too much primer removed, just re apply after you have rubbed it all down as above and repeat until smooth/guide coat free  

M4tt13 said

Remove rust etc, with anything that you feel will make the job easier, make your repairs and apply filler you'll be fine up to this part.
Sanding filler 80g working up to 240g paper
Flatting primer 400g working up to 800g as above
Use a guide coat (black aerosol) dusted on (really really light) to show the low spots in the primer while rubbing down. These will appear to have black on them whereas the high spots will have been rubbed away, aim to be rid of all signs of guide coat and make sure you use a flat rubbing block not just your hands!
That's pretty much it if you plan to take to a painter to finish. If you feel after your first pass with guide coat there is too much primer removed, just re apply after you have rubbed it all down as above and repeat until smooth/guide coat free  

perfect just what i needed, cheers!

No problemo dude!  

I'm planning to do this same thing! Good luck!