I'm of sure of the Temp of the oil cooler when in operation. Eastwood Powders are durable enough for under hood applications and heat resistant up to 250 degrees F.

Depending on size of bumper and coverage required.

All bare metal

No, 250 Degrees max

I use this exact system with the Extreme Chrome Eastwood PCS-250 Dual Voltage Powder Coating Gun New & Improved System with 2 voltage settings for great coverage in tight spots and large areas. CURRENTLY $159.99 Regular price $129.97 Currently Save $30.02 Eastwood Hotcoat Extreme Chrome Bonded Powder Coat 8oz $20.97 1LB 439.97 Eastwood Hotcoat Super-Gloss Clear Powder Coat 8oz $11.97 1LB $20.97

The item must be absolutely clean prior to powder coating. Eastwood Extreme Chrome Bonded Powder – This “Chrome” powder is the closest to the look of real chrome of any we have ever offered! Get an amazing chrome look with all the benefits of powder coating by going with our most extreme HotCoat™ chrome powder coat. This “Chrome” powder is the closest to the look of real chrome of any we have ever offered. It’s so reflective, you can read printed text in the reflection! Many people new to powder coating ask, “can you powder coat chrome”? You can when you have this extreme powder coating chrome from Eastwood. It’s great for motorcycle parts, under hood components, wheels and external trim pieces. You can also use it on tools and clamps. For best results, topcoat with a clear, translucent or candy powder from our selection of HotCoat powders. We recommend Super Gloss Clear to create a Super Chrome powder coat that’s a sight to behold. Do the Job Right on your powder coating project by choosing Eastwood. In addition to our high-quality powder and guns, we provide an entire section of free articles and videos that will help DIYers of all skill levels. Extreme Bonded Chrome Powder Features: High-Tech, Bonded Polyester-TGIC formulation for tarnish resistance Cures at 400°F Our most reflective “chrome” powder ever Topcoat with Eastwood # 10286 Super Gloss Clear for best results A perfect base under our translucent or candy powders for custom finishes So reflective, you can read printed text in the reflection! Great for motorcycle parts, under hood components and external trim pieces. For best results, topcoat with a clear, translucent or candy powder.

astwood Extreme Chrome Bonded Powder – This “Chrome” powder is the closest to the look of real chrome of any we have ever offered! Get an amazing chrome look with all the benefits of powder coating by going with our most extreme HotCoat™ chrome powder coat. This “Chrome” powder is the closest to the look of real chrome of any we have ever offered. It’s so reflective, you can read printed text in the reflection! Many people new to powder coating ask, “can you powder coat chrome”? You can when you have this extreme powder coating chrome from Eastwood. It’s great for motorcycle parts, under hood components, wheels and external trim pieces. You can also use it on tools and clamps. For best results, topcoat with a clear, translucent or candy powder from our selection of HotCoat powders. We recommend Super Gloss Clear to create a Super Chrome powder coat that’s a sight to behold. Do the Job Right on your powder coating project by choosing Eastwood. In addition to our high-quality powder and guns, we provide an entire section of free articles and videos that will help DIYers of all skill levels. Extreme Bonded Chrome Powder Features: High-Tech, Bonded Polyester-TGIC formulation for tarnish resistance Cures at 400°F Our most reflective “chrome” powder ever Topcoat with Eastwood # 10286 Super Gloss Clear for best results A perfect base under our translucent or candy powders for custom finishes

I'm not sure if the chrome over the Zinc powder will give you the effect your looking for as the chrome may well over-cover the zinc powder.