daletraylor

The fender grates on my 72 Stingray have the paint separating from the metal and peeling off. It happened like that before. I bought the car in 1984 and it had been repainted, some years later the grates were looking pretty shabby because so much of the paint had fell off. I had the car repainted about 10-years ago and now the same thing is happening again. The car has been garaged and only has about 6,000 miles on the current paint.

Is there some special process that can help to stop this from happening? Thanks, Dale

DUB

YES...because these egg crates are chrome plated...so the surface prep is critical. GM used a zinc-chromate primer back in the day...and IF I am not mistaken...I believe someone posted a response on getting this similar type of primer from a different source other than it being automotive related. I believe it had to do with painting airplanes.

I have a special primer that is not made any longer that sticks to stainless steel and chrome.

Look into it and see if you can find that thread.

I do not want to leave you out to dry on this ...so please come back and let us know what you have found ( if anything)....because if not...I will describe what I do and you will then have to use another primer that hopefully will adhere.

DUB

zwede

If you're ok with losing the chrome edges you can do what we did on mine. I never liked the chrome and wanted it all body color, so sandblasted the gills using low pressure. Then used PPG K36 primer and BC/CC. It stuck real well and no problems 7 years later.

DUB

This process can still be done but mask off the thin chrome edges with some of the blue vinyl tape from 3M to save the chrome.

I have to say you are bold and daring. I know I could not just apply K36 primer on the chrome...even with it being etched....knowing my luck...it would begin to fly off before the car even left the shop.

DUB

Mr D.

Maybe this will help.


ZINC CHROMATE PRIMER 1757B1C-T GREEN #34151

Bell Helicopter P/N 2230-06771-00

Randolph Products Company
33 Haynes Circle
Chicopee, MA 01020
Telephone 413-592-4191
Facsimile: 413-594-7321


ZINC CHROMATE PRIMER 1757B1C-T GREEN #34151

Solids by Volume: 44.6 +/- 2%
VOC content: 3.7 lbs/gallon (444 grams/liter) – as supplied
Solids by Weight: 63.4 +/- 2%
DFT: 0.7 – 1.0 mils
Viscosity: 16 – 25 seconds #4 Ford Cup
Gloss @ 60”: 6 maximum
Dry Time: Set to Touch: 5 minutes Dry Hard: 15 minutes
Theoretical Coverage @ 1 mil dft: 715 ft2/gallon
Shelf Life: Two years from date of manufacture

OR

SO-SURE Aerosol Primer-TT-P-1757B, Zinc Chromate Metal Primer, Green, 34151, NSN 8010-00-899-8825

http://store.armyproperty.com/produc...-899-8825.html

daletraylor

Thanks everyone. I am going to keep the paint on my egg crates with the factory look. Going to provide my painter with the product info that you guys have provided here on the Corvette Forum. Hopefully he has these products on hand or can acquire them and my grilles will stay painted for many years to come. Wish me luck.

Locke

Good luck Dale!

Locke

daletraylor

Cmon man, is that the best that ya got!

zwede

The chrome on mine was so bad (bubbles/flaking) that there wasn't much left after blasting. Probably why the K36 stuck.