+1, for the short term, Scotch Brite everything to get it clean and then spray with a rattle can color of choice. When you get home, disassemble, media blast and restore each piece one by one. I believe the side plates are available separately. yours look too far gone to repair (not enough good metal to weld patches to.
BTW, almost anything can be salvaged, just depends on how much work you are willing to put in. My grille started out like
this and ended up like
this. Lots of work to get it there as every horizontal grille element was bent/dented. Good luck.
