Hi guys I've been working my way around with the Rembrandt chalks and really feel that I'm failing miserably on the corrugated roofing to try to get a nice worn rusting look. I thought I'd come in and see if I could get some tips from you guys that utilize Bretts rembrandt wash technique.
The steps I took to getting to what I have here are I first primed the metal roofing with grey primer and let sit over nite. I then painted cut up and glued the sheets on the roof using canopy 560. I then gave a coat of 99% Alcohol mixed with waterproof India ink. I then applied the chalks one color at a time on the roof pulling them upward with the clear 99% alcohol. I'd wait and move onto another shade mostly experimenting The order in which I applied are from the top down in the photo.
I found by the time I was done the paint under the chalks was bubbling up more on one side of the roof then the other so I got my pencil wire scarper and pulled off the chalk and gave a fresh coat of polly rust ( not sure if it will stick to the bare metal or not but thought I'd try anyway.
Guys is there a proven sequence / technique to get a nice colored rusty corrugated roof?
Thanks in advance
before chalks added
After chalks added