Keeping the rust at bay

Having put so much effort into the replacement bodytub, I really wanted to make sure I was not going to have any bodywork issues for some time. Waxoyl is a commonly know make of cavity wax, but while looking around for the costs of it, I found things have moved on and there are other products, which perform much better. Based on cost, availability, and reviews, I went for Dynax S50 from Bilt Hamber. Along with a five litre can I ordered a injection lance, which is a length of tube with a diffuser on the end to make sure the 'wax' is thrown out 360degrees to coat all surfaces.

I didn't take any pictures while using the Dynax S50 as there isn't a lot to see really, but all the usual areas, such as around the wheel arches, in the sills and in the windscreen surround (especially over the top where GT6's like to rot out) were suitably coated.

With the inside and top side of the body all protected, there was just the underside to do, the job I was least looking forward to. As before, I wanted to coat the underside in something which would last, but all of the products I considered using required a clean and preferably bare metal surface. The headache I had here was that the underside had been coated with some form black Schultz underseal, which has a nasty habit of trapping water underneath it, but remains sticky, making it a pain to remove.

The process of stripping the underside took me quite a few evenings and weekends, it can be hard to motivate yourself to go and lie on a concrete floor to scrape off underseal and paint. The process I found most effective in the end was to scrape as much off by hand as possible, then use a bevel twisted knot wire brush on a angle grinder to get into the nooks and crannies to remove any last underseal. After that, it was a mix of strip & clean discs and flap discs to get the underside stripped.

After a bit more research, I had whittled it down to POR15 and Rust Bullet for the new underbody paint. I chose Rust Bullet this time as the overcoating did not need a primer, this paint is also UV resistant, unlike POR15, but I wanted to paint the underside in body colour anyway.

Rust Bullet needs two coats within four hours of each other, so the whole area I wanted to paint had to be accessible at once, this meant supporting the body from the extremities, not something I would recommend if you have any doubts about the strength of your body.

Screwfix sell single use paint brushes, which were just the job as I doubt it would have been worth using good quality brushes when there was little chance of cleaning them properly again. Eye protection and rubber gloves were also used, I did get a bit of paint on me and that took ages to remove, so I just hope it sticks to the car just as well.

24 hours after the second coat of Rust Bullet was applied I gave it a coat of green so it stands out less. The body has now been put aside while I prepare the car to remove the old body and carry out a few changes.