The coating layers were found to be 2-3 µm thick and increased with subsequent coating steps for both techniques. Raman spectroscopy revealed that the TTIP coating required laser treatment to convert it to crystalline anatase phase. Too high laser intensity induced phase transformation into rutile in both cases. The coatings were subsequently evaluated in their photocatalytic performance. Both for the degradation of methylene blue and the reduction of nitrobenzene, the coatings resulting from TTIP were found superior to the ones produced from P25 particles. In the former case, subsequent coating steps to produce a thicker coating also resulted in further improved photocatalytic activity. The optimized coating procedure was then successfully transferred to the three-dimensional substrate of the WLE shells.