The FTB Forum is now read-only, and is here as an archive.
To participate in our community discussions, please join our Discord! https://ftb.team/discord
I don't think that there is anything that you can use to pick the tank parts up without losing the coloring.
In the FTB-Wiki it says: "Breaking a tank block removes its color."
When you have also installed Advanced Solar Panels you can turn things into other things with a molecular transformer.
The molecular transformer needs huge amount of power. For example you can turn one wither skeleton skull to one nether star.