Paint don`t go off sodablasting

Hi,

Today I tested soda blasting for first time, and it was not so efficient I hopped for, but it worked.
When I blasted the underside of the gas tank there was no problem removing the paint,
but on the other side I got problem... the soda is not able to remove the paint...

I tried to use sandpaper and it looks to be soft (the paint) when I got some temperture with the manual sanding the melted. so it made lumps. Please see attached picture... what todo know.. I have not access to sand blasting.

I was thinking fill the tank with water and use sandpaper on my grinder?

The special sandpiper for grinder have I used on other parts really nice and efficient... but I don`t know if I got problem
with sandpaper on these special paint?

1. Fill with water
2. Use my grinder with sandpapirer (not cut disc)
3. take out the water and dry the tank.
4. Use epoxy primer on the tank.
5. deliver it to a pro paint shop later. for painting.

aircraft stripper.

retterath wrote: aircraft stripper.

That is the sheet? it will take the paint and the primer and give me blank steel?

Yep. Aircraft stripper will remove it all. Sometimes it can take more than one application.
I like to use it prior to bead blasting to make the paint easier to remove.

I diden`t find the same in Norway, but I have order now KLEAN STRIP PAINT REMOVER, hope that is doing the job also?

What to do after you have used the stripper, can you just use silicone remover and prime the surface?

Aircraft Paint Remover is made by Klean Strip, might be called something different over there. The Aircraft one is supposedly their strongest one. I've used it many times, especially good for removing clear coat on aluminum before polishing.

For prep, there are specifically made "pre prep" cleaners but you can use acetone as well prior to shooting primer.

Silicon remover is not strong enough?

I have not been able to get some good stripper in Norway (stringt rules) the company was empty in stock for Klean strip... so I needed to wait for 2-3 months for import....

So I have purchase one in the shop it was not so power full... I have been able to take of 2 layers in first round, and have now painted a second round and let it stay for 24 hours.... Hope I`m able to get the rest of.

See attached pictures.

Are you going to repaint the tank? If so & since the old paint is so tough, why bother removing it? I was going to strip my fuel tank, but the original paint was like armor, so I just sanded it with emory cloth.

That is plan, but I wanted to check for corrotion, have fund some under the paint...
But know I will stop, remove what I`m able to today, and then prime it again...

If there's corrosion, then you probably ought to remove as much as possible so that you can thoroughly inspect the metal. My tank wasn't rusted at all, not even at the triple tree dings.

Stripping off all the paint is a good idea. There is often spiderweb corrosion crawling under the old paint. The photos show an odd condition though, looks like plastic body putty under the paint. I'd keep going with the stripper and then move back to the media blasting to get all the remaining corrosion off from around the tank opening and on the underside. You need a perfectly clean metal situation if you want a lasting paint job.

I found some corrosion under the original primer, so I`m glad I took of almost everything, it looks like the welding edge around on the tank is a critical area for corrosion.

I have sprayed 2k epoxy primer today.