In This Article
Finished in Signal Blue
Cameron Britt ran the full Alpha Automotive Paint system on this BMW in RAL 5005 Signal Blue — a deep, saturated factory blue matched to the OEM RAL 5005 Signal Blue code. The build ran the complete system: DTM primer-sealer, RAL 5005 Signal Blue basecoat, and HS Glamour clearcoat, all laid over a grey sealer so the color reads its full, intended depth.
Below is how it came together — the prep, the products, and the steps you'd follow to chase the same finish on your own BMW.
Free Download
Get the TSS Cheat Sheet — free.
Mix ratios, flash times, gun settings, and troubleshooting — one page, in your inbox in seconds.
Download the Free PDF →Meet the Builder: Cameron Britt
Cameron Britt sprayed it start to finish with the same RAL 5005 Signal Blue vehicle paint kit we ship to every customer — no shop-only products. The system is the DTM primer-sealer, RAL 5005 Signal Blue basecoat, HS Glamour clearcoat, plus urethane reducer, HS activator, and the TSS cheat sheet to keep the ratios straight. The kit you'd buy is the kit on this BMW.
The Color: Why RAL 5005 Signal Blue?
RAL 5005 Signal Blue is an OEMatch automotive basecoat precisely matched to the RAL 5005 Signal Blue code — a rich, high-saturation blue designed as a 2-stage system for a refresh, a color change, or a full restoration.
Sprayed over a grey sealer, RAL 5005 Signal Blue delivers full coverage and reads at its truest, cleanest tone — the grey sealer is the foundation the color was designed for, and the RAL 5005 Signal Blue kit ships with the DTM primer-sealer for exactly that.
Want to spray a RAL 5005 Signal Blue sample yourself?
This color doesn't have a pre-sprayed sample yet, but you can build your own DIY sample if you have spray equipment:
Every Way to Get RAL 5005 Signal Blue
Whether you're painting a full vehicle, a motorcycle, a guitar, or just touching up with a spray can — RAL 5005 Signal Blue is available for every project size. Each kit includes matched products sized for the job.
RAL SIGNALBLAU 5005 | OEMatch Automotive Vehicle Paint Kit
$836.93 USD
Shop Now
RAL SIGNALBLAU 5005 | OEMatch Automotive Basecoat
From$22.99 USD
Shop Now
RAL SIGNALBLAU 5005 | OEMatch Automotive Spraycan
$45.99 USD
Shop Now💡 Pro Tip
A solid deep blue shows every hazing and coverage flaw — keep your ground coat uniform and let each basecoat coat flash fully so the blue lays down dead-even.
What's Inside the Vehicle Paint Kit
These are all the products included in the RAL 5005 Signal Blue Full Vehicle Paint Kit. Every product is already matched and compatible — no hunting across brands, no guessing on ratios.
DTM Primer-Sealer (AP-7541) — The ground coat RAL 5005 Signal Blue is built on. AP-7541 DTM primer-sealer lays a uniform, full-coverage foundation so the color reads exactly as designed.
RAL 5005 Signal Blue Basecoat — RAL 5005 Signal Blue basecoat is the color itself — a factory-matched OEM shade, reduced and sprayed in even 2-stage coats.
HS Glamour Clear (AC-4521) — AC-4521 HS Glamour clearcoat lays the deep, glassy gloss over the color and locks in UV and chip protection.
Alpha Urethane Reducer (AR-3000 Series) — Alpha urethane reducer thins the basecoat to a spray-ready consistency for even, controlled coats.
HS Activator (AH-7100 Series) — AH-7100 HS activator catalyzes the HS Glamour clear so it cures hard, clear, and durable.
TSS Cheat Sheet — The TSS cheat sheet keeps every mix ratio and flash window at hand through the whole job.
Optional Add-Ons
The vehicle paint kit has everything you need to go from prepped surface to finished paint. But depending on where your project is starting, these add-on bundles can save time and money on the prep and masking side:
Bodywork Bundle
$175.00
Body filler, abrasives, and everything for panel repair. Ideal if your project needs dent or rust repair before paint.
Shop Now
Light Bodywork Bundle
From $92.99
Dolphin Glaze finishing putty and OptiGrit sanding abrasives. Perfect for filling pinholes, minor scratches, and light surface imperfections.
Shop Now
Mask & Mix Bundle
$75.00
Mixing cups, strainers, masking tape, and masking paper. Everything you need for clean, precise masking and easy paint mixing.
Shop Now
Linear Blocking Tools Starter Set
From $236.50
CNC-cut polycarbonate sanding blocks with lifetime warranty. Produces perfectly flat, straight panels for a professional finish.
Shop Now
OptiGrit PSA Sandpaper Bundle
$64.99
Complete PSA sandpaper set in 80, 180, 220, and 320 grit. The full grit progression for blocking and prep, sized for long boards.
Shop NowThe Complete DIY Process
Step 1: Prep & Bodywork
Every finish this clean starts with the metal underneath. The BMW was blocked straight and the old finish knocked down with OptiGrit abrasives before a single coat went on — skip this and RAL 5005 Signal Blue will telegraph every flaw.
Step 2: DTM Primer-Sealer (Grey Sealer)
A grey sealer of DTM primer-sealer is the foundation RAL 5005 Signal Blue was built on — it's what lets the color read full and true. Lay it uniform and let it flash before basecoat.
Step 3: RAL 5005 Signal Blue Basecoat
RAL 5005 Signal Blue basecoat mixes with Alpha urethane reducer and builds in smooth, even coats until the color comes up evenly across every panel. Let each coat flash — patience here is what makes the finish look deep instead of blotchy.
Step 4: HS Glamour Clearcoat
HS Glamour clearcoat, catalyzed with HS activator, is where the depth comes alive — it buries the color in gloss and gives you the wet, glassy finish you see on the finished BMW. This is also your UV and chip protection.
Step 5: Cut & Buff
Once the clear is fully cured, a light cut with fine OptiGrit and a buff brings RAL 5005 Signal Blue to a mirror. Reference the TSS cheat sheet for the ratios and flash windows so nothing gets rushed.
Ready to Paint Your Own Build?
Everything used on this BMW — DTM primer-sealer (your grey sealer), RAL 5005 Signal Blue basecoat, HS Glamour clearcoat, reducer, activator, and cheat sheet — in one kit.
Build Your RAL 5005 Signal Blue Kit — $836.93 USDLooking for a different color or kit size? Browse all car kits →
See It in Action
TSS painting tutorials and kit walkthroughs — the answers we get asked most.
Frequently Asked Questions
Yes. RAL 5005 Signal Blue basecoat is an OEMatch color matched to the RAL 5005 Signal Blue code, so it re-sprays and blends to factory appearance.
A grey sealer. The RAL 5005 Signal Blue vehicle paint kit lays a uniform DTM primer-sealer ground coat so the blue covers evenly and reads at full saturation.
Yes — RAL 5005 Signal Blue is available in an aerosol spray can color-matched to the same basecoat for chips and small panels.
Every Product Used in This Build
RAL SIGNALBLAU 5005 | OEMatch Automotive Vehicle Paint Kit
View →
RAL SIGNALBLAU 5005 | OEMatch Automotive Basecoat
View →
DTM Primer-Sealer AP-7541 Kit | Alpha Automotive Paint
View →
HS Glamour Clearcoat AC-4521 Kit | Alpha Automotive Paint
View →
Urethane Reducer AR-3000 Series | Alpha Automotive Paint
View →
HS Activator AH-7100 | Alpha Automotive Paint
View →
Limited Time Deals
Clearance & Flash Sales
Discounted kits, closeout colors, and flash deals — check back often, these move fast.
Shop Current Sales →Big thanks to Cameron Britt for running the system as designed and turning this BMW into one of the cleanest RAL 5005 Signal Blue builds we've seen. This is exactly what the RAL 5005 Signal Blue kit was built for.
Stay connected with the TSS paint community: follow tutorials and color reveals on YouTube, short-form builds on TikTok and Instagram, and join the Facebook community group.
Want to be featured? Tag @thespraysource or email sales@thespraysource.com.
