I still have my Dumas BSB from '76 with the original ST60 glow engine. Painted it with K&B epoxy paint (do they still make that ?). Looks as good today as it did when I built it.
Mine always turned better to the right and I just lived with it. I always used wooden props and the only time they wore out was when I was following my buddy around ingesting the water spray from his boat. Trimmed the prop down nicely !