How should I go about fixing this?

fiberglass? Weld new metal plates? bondo (or other putty)?

brake all that shit off and us every bonding material known to man.........

i say metal plates

I need to break a bit more off. I am coming home this weekend, so I want to get as much done as possible and finish undercoating my car

just put some skirts on.

but seriously. grind that down, get rid of all the rust, primer it, then bring it to a body shop.

itd probably be cheapest to grind, use self-etching primer, then cover it with a side skirt though...

cut the rust off primer it and get a body kit

I already am planning on giving my car the type-x body kit treatment (have 3-piece rear valence already) but possibly debating a silvia front end, dont know yet. But, I kinda want to get other important mods before I finish the body. But, maybe I should just get the sideskirts. Time to search on ebay.

Dude get pig nose front lip and origin stylish side skirts and ur done.............

how much roughly do body/paint shops charge to spray rear valences and sideskirts?

nothing compare to wat it costs to fully repair that rust problem......

I am getting some kouki 4 piece sideskirts sometime next week. Just need to prep the area and stuff now

truck boy thats a dope pick if only the silvia was still alive
Just grind all that shit off no point in doing something that wont last get it done the right way the first time

you have to grind it off and weld new metal onto that side, its the only way to fully rid yourself of that problem. i have a spot of rust about 2-3 inches under my car that i will patching sometime soon. i lucked out because it's under the car so all i have to do afterward is sealcoat it i don't have to worry about painting it.

cut out the cancer...

bondo is a band-aid

fiber glass is a band-aid

cut it out... the only thing you can do. then the repair is up to you, spend the money for a bodyshop to fab in new metal or just cover it with sideskirts

I think I am going to cut out/grind the rest of the rust and fill in the area with some type of foam. I will then mold the foam to the shape of the body. Then, weld in some metal to the flat spots, and then use this por-15 putty stuff for the curved spots. The stuff dries rock hard and it can be drilled through. Then, cover the area with kouki side skirts

Just buy something to convert the rust into primer i think murrays carries it use that to stop the cancer(rust) then just cover it up and forget it.......Uve been pimped!!!!!

Cut, tack, fill, then spray.... Best way to do the job. I say don't half ass it. Just my opinion.

por-15 is a rust killer/converter. I already used it on most of the rust on my body. I wasnt able to get to that part this weekend though

I used rust bullet - you can only order it online. It's what most of the muscle car guys use.

Cut it all away befor you sitting on it. Make a brace for you side skirts if you cant make one your self stop by a sheet metal shop theyll probably be cheaper than a body shop; unless your using them to install and paint your side skirts. just hussle