Hi Bubble
Something like
Spray and Slide is meant more for dry embossing rather than just doing a quick score on a card to fold. A spray, or wiping with a tumble dryer sheet, shouldn't be needed for scoreing. It just makes embossing easier by spraying over the back of the card to make an embossing tool slip easier and acts as a lubricant. It wouldn't be used on the front of a card for scoring.
Every scoreing board I've had has come with a scoring tool of a suitable size for the groves on that board, so using a different tool may not be of the right size for the board.
If you are using just a scoreing tool and a ruller then you could try experimenting with sizes, but I do know that a very small ball tool is more likely to scratch and break the surface, and a very large ball tool won't produce a crisp fold. The end of a bone folder, depending on the bone folder, can work quite well. Yesterday I saw somebody demonstrating folding one type of card and for that she recomended scoreing back and fore several times on the back only, adding pressure gently each time. She also said not to burnish after folding as that was more likely to cause cracking. She wasn't using a pearlescent card, but the tip may work with your card.
Unfortunately, some card is just too think, or the texture or finish is such, that it will never score and fold cleanly.
GG