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322 Posts
I have (or had) a graco mark IV, well it stoped working the other day, and after a cpl hours of messing with it I discovered that the chrome plateing inside the houseing (where the paint filter goes) was flaking off (in handfuls) well Graco says,, ahh,,, too bad your warranty is up, and drywall mud IS corrosive. After the company I bought it from, ALL-WALL, talked to em, they decided that maybe they WOULD take a look at it, so I sent it off to a graco approved pump repair in Wilmingtom,, I expect to hear back for them next week.