what would you like to know? im a bit of a jack of all trades lol, been repairing salvage for years.
key things are to key the area ready for filler, ie scotchpad or a bit of 1200 etc, run your hand over area tap in any high spots, apply your filler sand and prime, if its a flat ish are use a block with the paper to get it flat, use the 2k primer it dries solid, quite a few layers thick doesnt hurt, wet flat the primer back with a block, i tend to use an old bit of 500 for it but you can use 800 etc, then key the whole panel with a scotch and water or 1200 and water, i use ajax vim powder etc with water and a scotch, it cleans the area well, then wash of clean with sponge dry the area and panel wipe the whole area to be painted, are you using base coat and clear or solid?