Recently I created my own custom diffuser for the Scala. Main reason for this is that I bought the Maxton Design rear Valance to fit to the stock lower bumper panel, and it didn't fit flush and had an overall cheap feeling to it. Sure enough after only a week it cracked, as I had put it under so much stress trying to fit it as flush as possible. Instead of spending another 100+ on a new one I decided to approach skoda for the lower rear bumper and to my amazement the whole section was only 65GBP. So decided I would rather purchase that and the materials and have a go at making a custom one. Here is my journey.
I don't have pictures of the early stages but essentially I measured out the mid section of the bumper panel between the exhaust dummy ports, I then divided this up for where I wanted the diffuser fins to be, used a depth gauge to get a profile shape onto cardboard and then cut that into shape as a template.
The rest is as follows
Cut fin shapes out of ABS 12mm plastic using jigsaw, then use a rasp/file/80p sandpaper to refine.
The 2 center and 2 outer fins were the same shape.
Using masking tape to check fitment
I then pre-drilled holes for standard VAG hex screws using small spring clamps, cleaned the area with isopropanol and lined the joint with Gorilla Epoxy glue and mounted the fins into position
Fin mounted using screws and epoxy
All fins mounted on and panel sanded down with 180P sandpaper, waiting for a small strip of ABS to arrive to extend the bumper
3mm ABS strip arrived was cut to shape and placed to extend the bumper (purpose of this is to hide underglow LED strips as bulbs were previously visible when mounted)
Using U-pol Plast-X filler to fill holes, and refine the shape. This stuff stinks! Immediately took it outside.
Initial pass with filler, definitely put too much on, but learning as we go.
After a lot of sanding, using 80p, 180p, 340p and 420p sandpaper
Excuse the dark dots, it was raining as I got it in the car to take for priming/painting.
For the final stage, I got the good fold at Berkhamsted Bodyshop to use a builder primer, do a final sand pass ready for painting and the paint it in gloss piano black.
Here are the results
It is not perfect, and there are things I would do better second time around of course. But it is hand done, by me, fully custom one of a kind. I love it, think it looks way better than the Maxton one.
Hope you all enjoy seeing the process.
Oh and I am a 3D artist in his late 30s with an interest in DIY, I am by no means skilled at this type of thing, just watched some youtube tips and tried my best. If you have the time, don't be afraid to give things a go.