Mag Rot - How Far Is Too Far?

[Vintage Engine Repairs]

In my experience you’ll know right away if a paint isn’t resistant to fuel. It will gum up and or wash off.

That is very very good to know, I guess like what acetone would do to standard paint?

 

[Vintage Engine Repairs]

Are you applying fuel or just oil?

One test will be Two stroke fuel oil mix and the other test will be bar oil

for transparency, it’s Motomix not pump gas

 

[Vintage Engine Repairs]

Not needing two controls I took one of each of the paint controls and will soak them in motomix. 24 hour cure time has passed. Will check them daily against the remaining control from each paint

 

[Vintage Engine Repairs]

Not sure if anyone is hanging in and following along with this post still, but I’ll update you guys


24 hours of soaking in fuel, surface finish didn’t change, the enamel did soften to where I could pick it off with my nail. I then removed the excess fuel with a tissue and let them both dry in the sun for an hour. Both paints returned to original hardness, could no longer dent with my nail and the surface finish wasn’t affected.

I’m going to scrap the original test as I feel this is far more telling. However I will now cut two more squares out (one of each paint) and submerge them in bar oil for 24 hours and will report with results

 

[Vintage Engine Repairs]

More updates with the build.

fixing the uneven bar mount plate support thing. Very untrue to start with and through to square.

BEFORE

DURING - NOTE THE LOW SPOTS IN DARK GREY

AFTER- EVEN COLOUR THROUGHOUT

 

[SEAM]

Coming along nicely !

 

[Vintage Engine Repairs]

Coming along nicely !

Thank you

 

[Sepia]

What did you use on the bar pad to get it flat again?

 

[Vintage Engine Repairs]

A piece of glass and silicone carbide paper!

 

[svk]

Nice work

 

[Jkstihl]

2 stroke fuel mix in one and bar oil in another all ready for the test in 7 days

View attachment 800534

Dr. Tom...looking good.

 

[svk]

Tom, just a thought. Now that you have it "true" you may want to scuff it up just a little so it holds the bar in position a bit better?

 

[Vintage Engine Repairs]

Tom, just a thought. Now that you have it "true" you may want to scuff it up just a little so it holds the bar in position a bit better?

That’s not a bad idea!! Thanks

 

[Vintage Engine Repairs]

I won’t be winning any points for surface finish, it’s hard to sand such tight and small crevices, but it will protect nicely. This has just had its second coat of primer. Tomorrow I’ll do 2-3 top coats and let it dry and put the thing back together.
I’m proud my repair of the AV mount looks nicer than the other one that is original tho...

 

[Vintage Engine Repairs]

I guess this is where it’s important to put things Into context before I get too disheartened with the appearance and I still have a glossy top coat to put on which may help it out a bit

 

[Sepia]

Nice work Tom! You have shown what can be done in a situation where replacing a part may not be an option.

Now... on to the assembly!

 

[Vintage Engine Repairs]

Nice work Tom! You have shown what can be done in a situation where replacing a part may not be an option.

Now... on to the assembly!

Thank you Cj and for hanging in there and continuing to follow the post, as well as you @svk it’s appreciated guys

 

[Canyon Angler]

[/QUOTE]

If you don't deblush that shiny epoxy before painting, the paint will wipe right off like grease -- if not now, then in the future as the epoxy blushes out more amines.

I would use sandpaper/Scotchbrite and vinegar, then rinse well with fresh water, then dry, then paint.

Google "epoxy amine deblushing" if you need to know more.

 

[Vintage Engine Repairs]

Thanks mate, already did

I sanded, washed, soaked in Evaporust (which is also a degreaser) rinsed in water, dried in the oven, taped over holes and used tissue and then primed with 30-40 mins between first and second coat.
I appreciate you bringing it to my attention !!

 

[trains]

Looking good Tom, enjoy the pictures, progress and process you post up and write.

Job well done.

T