Shiroi: You can buy gaffer tapes from me at $38 each. Currently doing an MO for it in Consumer's section.
Well, there are many types of gaffer tapes, some cost $8 per roll, some cost $5 per roll even. Someone even mentioned to me that there's a shop in Sophia road that sells these. The reason why you pay the premium of $38 is because of the non-residual, non-slip and tough quality; plus it's imported from USA. Consider it a small premium to pay for your big investment.
Most important of all, the surface that you're applying gaffer has no traces of oil or solvent. Any type of adhesive will be transferred to surfaces with oil, especially.
Del_CtrlnoAlt: I do have white ones if you're interested. Special order for u