Removing undercoating is a royal PITA

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I’m finally back to work on my 1967 MGB GT as lots of painting needs to be carried out in the next month or so. My main project at this point is trying to remove as much of the old undercoating from the battery boxes forward. I’m doing this for two reasons, firstly to check the area for rust and deal with any that’s found and secondly, it will just look a whole lot better than 50 years of built up crud and dirt does.

Underside of MGB floor pans
Underside of MGB floor pans

The old undercoating is really tough and a pain to remove. Scraping with a chisel works OK, using a heat gun and scraping works a little better but, I’ve found my super cheap Harbor Freight Multitool with a scraping blade to work the best. A wire brush on a drill is almost useless until I’m down to the final surface.

MGB GT transmission tunnel
MGB GT transmission tunnel

Here’s the good news about this part of the project. I expected to see a little rust through in the floor pans as everyone seems to be replacing these while doing their MGB restorations. This car? No rust through, only very light surface rust in a few areas.

Light surface rust on MGB floor
Light surface rust on MGB floor

Most of the original primer is still intact as well, perhaps it was convenient that the underside wasn’t cleaned in a long time if ever. I’ve attached a before photo below to remind myself that I am making progress! Next up, priming and new undercoat.

MGB undercarriage before cleaning
MGB undercarriage before cleaning

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