DIY 3M Sun Gun Tutorial - Alfa Romeo Forum
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DIY 3M Sun Gun Tutorial

I'm sure you're aware on detailing world there is a long standing thread on how to make your own DIY version of the 475 3M Sun Gun for a fraction of the price.

The 3M Sun Gun

3M Sun Gun II | Professional 12V Rechargeable Swirl Mark Spotting Torch

Detailing World Thread

The Ultimate Home-Made swirl spotting torch - Detailing World

This is how I did it...

Firstly you'll need the parts:

B&Q Performance 14.4V drill - 24.00 new or from 5 used on eBay

Performance Power Cordless 14.4V Combi Drill 1 Battery | Departments | DIY at B&Q

MR16 Lamp Holder - 2.45

B&Q Gloss Plastic Lampholder | Departments | DIY at B&Q

Solux MR16 Daylight bulb (Spec 35W 4700k 36*) - 10.35

Note you can get other brands much cheaper.]

Tools needed

First is to dissemble the drill, by simply unscrewing the eight screws

Then cut the red and black cables above the trigger switch to remove the drill motor.

Join the bulb holder to the cut cables

I did have to modify the casing to remove a few ridges to allow the bulb to sit flush and hence enable the casing to fit together properly.

Insert bulb screw back together and admire your handy work.

You won't find any swirls on my Alfa

Total cost circa 37.00 for brand new parts saving you 400+.

To clarify the bulb in this is exactly the same as the 3M product therefore this is exactly the same performance as the 3M Sun Gun.

Thanks to the guys in Detailingworld for the excellent write up on this.

Back in the fold !

Last edited by A6; 18-02-15 at 20:37.
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i went for a 500 watt duel halogen tripod thing which you can by for 25 quid... because. when you are detailing theres so much parafinalia this was one less thing to handle. And its like important to have a real powerfull light source on the go over the car.

but gotta say its impressive work. 425 quid for a halogen torch. ouch. I would do the DIY job if I didnt have the tripod thing.
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Great write up and pics A6
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Jeez! You detailers are all mad as a box of frogs, 400 odd quid for a torch!?!? ;-)
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well theres not may halogen torches out there so you would expect it to maybe command a price of like 30 quid or something because of the battery. At 400 plus quid yer they are making money. but they prolly will only sell less than 1000, so to build and develope a halogen torch isnt gonna be too appealing as a business investment.

Does tie in with what I was saying in the other post about detailing. A lot of these detailing products are really expensive and its big business.
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It has only been in the last few years that some detailers have starting using the Sun Gun or the much cheaper DIY version but it is worth remembering 3M make the Sun Gun for bodyshops to allow accurate paint matching and identify paint defects 3M™ PPS™ SUN GUN™ II Light Kit, 16550 or for those who like videos

The price seems very high to me but I am not running a bodyshop
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we use the 3m sun gun at work it's a brilliant bit of kit as said already it's intended use by 3m is for colour matching inside the body shop and that's what we use it for. it saves us having to take the car outside to check colours that alone can mean having to move quite a few cars about form the oven entrance to the main doors never mind the fact that we live in the uk and the weather it seams is always against us so the 300 quid we paid is cash well spent. but I don't have that kind of cash to flash but I do have an old drill in the garage and I know we have some bulbs kicking about, so can see a project forming !!
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