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Old 10-22-2021, 01:16 PM
werminghausen werminghausen is offline
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Join Date: May 2006
Location: Boston
Posts: 1,410
Quick update:

I ended up buying a Campbell Hausfeld gun kit with a bigger gun (1.4mm nozzle) and smaller detail gun. I got is for less than $100/
It worked quite well for me as beginner and I could use my small Makita compressor which managed the job quite well, installed a desiccant dehumidifier.
I bought all the paint and cleaners from Tamco for around $230 for the window shelf and trunk lid: gray primer, black basecoat and clearcoat plus cleaners
I was lucky to have a couple of good warm days in October and the job is done.
Of course I did all the mistakes a beginner does and so it took longer to correct the problems.
The first primer layers were a mess until I managed to adjust the gun pressure and paint right. Campbell noted pressure for the LPHV gun with 40-50psi.... but this is obviously very wrong- way to much overspray with this pressure. I found that a pressure of 25-30psi worked much better. The small detail gun works best at around 15 psi. This gun is perfect for the narrow bottom shelf that I needed to paint while the big gun is good for the trunk lid.

I used POR15 putty as a filler (rear window shelf and the trunk lid corrosion portions followed by epoxi primer.

The trickiest parts were blending in the repair parts into the old clear coat.
I still don't know if this worked or not. I need to polish and see what comes out.

The trunk lid had too much orange peel in the clear coat and I decided to sand it slightly with 1000 and 2000 grit before I attempt to polish with the machine. I should probably wait a week or so until I can polish. Temperature are down to 50s now. The hardening will be slower.

The rear wind shield is installed by now and so far it is looking good.

Please comment.

Best, Martin
Attached Thumbnails
newbie: Spray gun advise for Painting my W126 500SEL  rear-screen-shot-2021-10-22-1.00.44-pm.jpg   newbie: Spray gun advise for Painting my W126 500SEL  rear-screen-shot-2021-10-22-1.01.45-pm.jpg   newbie: Spray gun advise for Painting my W126 500SEL  rear-screen-shot-2021-10-22-1.04.38-pm.png   newbie: Spray gun advise for Painting my W126 500SEL  rear-screen-shot-2021-10-22-1.12.49-pm.png   newbie: Spray gun advise for Painting my W126 500SEL  rear-screen-shot-2021-10-22-1.12.31-pm.jpg  

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