After getting out the filler, it’s time to get the undercoating out of the rear wheel wells and the area above the IRS. I have tried EVERYTHING to get out the undercoating, and there’s just no easy way to do it. Some people do manage to blast it out, but I shudder to think of the volume and pressure they are using! Anything even close to the realm of “normal” pressure for blasting just bounces off. Sometimes you can scrape it dry with some success – this wasn’t one of those times… There is also alot of rubber seam sealer up in here, and that all has to come out too – it is always rusted underneath. So you just suit up and jump in!