What can I use to remove print from hard surfaces? I have a lot of profile products with the logotype of the company handing them out printed on them. In some situations I don't like to show these logos. However, it is stupid to bin working products for this reason so I would like to remove the print on them.

What solvent can be used for this purpose? What solvent is used in this type of colours? 

Currently there are two items I want to remove the printing from:


A clear plastic bottle in BPA free tritan. 
A tool in, I think, aluminium (metal anyway) with a surface similar to a Macbook Pro.
Tritan is a co-polyester. It is prone to stress cracking in the presence of a number of common solvents - cyclohexanone and tetrahydrofuran are used as surface bonding agents.

Acetone can induce stress cracking, as can IPA. 

I would suggest overprinting if you want to disguise the logo.

As for the aluminium item - take your choice - cyclo, THF, acetone, xylene - lots of options.